> ## Documentation Index
> Fetch the complete documentation index at: https://hyperframes-feat-registry-loop-blocks.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Loop Hero Reel

> A row of thumbnails with the active one lifted and enlarged, stepping along the row. 8 image slots, 10s seamless loop, 1:1.

export const InstallCommand = ({command, item}) => {
  const [copied, setCopied] = React.useState(false);
  const [tuned, setTuned] = React.useState("");
  React.useEffect(() => {
    if (!item) return;
    const read = () => {
      try {
        const raw = new URLSearchParams(window.location.search).get(`vars-${item}`);
        if (!raw) return setTuned("");
        const parsed = JSON.parse(raw);
        if (!parsed || typeof parsed !== "object" || Array.isArray(parsed)) return setTuned("");
        if (Object.keys(parsed).length === 0) return setTuned("");
        setTuned(` --vars '${JSON.stringify(parsed)}'`);
      } catch {
        setTuned("");
      }
    };
    read();
    window.addEventListener("hf-vars-changed", read);
    window.addEventListener("popstate", read);
    return () => {
      window.removeEventListener("hf-vars-changed", read);
      window.removeEventListener("popstate", read);
    };
  }, [item]);
  const fullCommand = `${command}${tuned}`;
  const copy = async () => {
    try {
      if (navigator.clipboard && window.isSecureContext) {
        await navigator.clipboard.writeText(fullCommand);
      } else {
        const previous = document.activeElement;
        const scratch = document.createElement("textarea");
        scratch.value = fullCommand;
        scratch.setAttribute("readonly", "");
        scratch.style.position = "fixed";
        scratch.style.opacity = "0";
        document.body.appendChild(scratch);
        scratch.select();
        document.execCommand("copy");
        document.body.removeChild(scratch);
        previous?.focus?.();
      }
      setCopied(true);
      setTimeout(() => setCopied(false), 2000);
    } catch {}
  };
  return <div className="hf-install-command not-prose my-4 flex items-stretch overflow-hidden rounded-xl border border-zinc-200 bg-zinc-50 dark:border-zinc-800 dark:bg-zinc-900">
      <code className="flex-1 overflow-x-auto whitespace-nowrap border-r border-zinc-200 px-4 py-3 font-mono text-sm text-zinc-800 dark:border-zinc-800 dark:text-zinc-100">
        {fullCommand}
      </code>
      <button type="button" onClick={copy} data-copied={copied ? "true" : "false"} aria-label={`Copy ${command} to the clipboard`} className="hf-install-copy">
        <svg className="hf-install-copy-clipboard" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 18 18" fill="none" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
          <path d="M14.25 5.25H7.25C6.14543 5.25 5.25 6.14543 5.25 7.25V14.25C5.25 15.3546 6.14543 16.25 7.25 16.25H14.25C15.3546 16.25 16.25 15.3546 16.25 14.25V7.25C16.25 6.14543 15.3546 5.25 14.25 5.25Z" />
          <path d="M2.80103 11.998L1.77203 5.07397C1.61003 3.98097 2.36403 2.96397 3.45603 2.80197L10.38 1.77297C11.313 1.63397 12.19 2.16297 12.528 3.00097" />
        </svg>
        <svg className="hf-install-copy-check" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 18 18" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
          <path d="M2.75 9.5L6.5 13.25L15.25 4.5" />
        </svg>
      </button>
      <span className="hf-install-copy-status" role="status" aria-live="polite">
        {copied ? "Copied" : ""}
      </span>
    </div>;
};

<video className="w-full aspect-video rounded-xl object-cover bg-zinc-100 dark:bg-zinc-800" src="https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/loop-heroreel.mp4" poster="https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/loop-heroreel.png" autoPlay muted loop playsInline />

## Install

<InstallCommand command="npx hyperframes add loop-heroreel" item="loop-heroreel" />

That writes one file: `compositions/loop-heroreel.html`.

## Add it to your video

It runs for 10 seconds at 1080×1080. Paste this into your composition:

```html index.html theme={null}
<div
  data-composition-id="loop-heroreel"
  data-composition-src="compositions/loop-heroreel.html"
  data-start="0"
  data-duration="10"
  data-track-index="1"
  data-width="1080"
  data-height="1080"
></div>
```

Move it in time with `data-start`. Put it on a different timeline row with
`data-track-index`. See [data attributes](/concepts/data-attributes) for the rest.

## Variables

Every one of these has a default, so the piece works untouched. Set the ones you
want to change on the element:

| Variable                  | Default                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                | Accepts                                                                                                                           | What it does                                                                             |
| ------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------- |
| `mediaFit`                | `crop`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | `natural`, `crop`                                                                                                                 | Natural keeps each image's own ratio; Crop fills the card box at the media aspect below. |
| `cropAspectRatio`         | `1:1`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | `16:9`, `9:16`, `1:1`, `4:5`, `3:2`, `3:4`, `2:3`                                                                                 | Card aspect used when Fit is Crop.                                                       |
| `backgroundType`          | `gradient`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             | `gradient`, `color`, `image`                                                                                                      | Gradient (start → end colours), flat Colour, or your own Image.                          |
| `backgroundGradientStart` | `#111111`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | color                                                                                                                             | Top colour of the gradient.                                                              |
| `backgroundGradientEnd`   | `#444444`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | color                                                                                                                             | Bottom colour of the gradient.                                                           |
| `backgroundColor`         | `#0b0b0f`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | color                                                                                                                             | Flat colour when Type is Color; also the ground under an Image.                          |
| `backgroundImage`         | \`\`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | image                                                                                                                             | Cover-fitted background when Type is Image.                                              |
| `blurAmount`              | `0`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 0px to 60px, step 1px                                                                                                             | Blur on the background image, px.                                                        |
| `backgroundGradientNoise` | `0`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 0% to 100%, step 1%                                                                                                               | Film-grain overlay strength.                                                             |
| `backgroundOpacity`       | `1`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 0 to 1, step 0.05                                                                                                                 | Opacity of the whole background layer (0 = transparent ground).                          |
| `shadowEnabled`           | `false`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                | `true`, `false`                                                                                                                   | Shadow Enabled (engine parameter; see the block header comment).                         |
| `shadowX`                 | `0`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | -40px to 40px, step 0.5px                                                                                                         | Shadow X (engine parameter; see the block header comment).                               |
| `shadowY`                 | `1`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | -40px to 40px, step 0.5px                                                                                                         | Shadow Y (engine parameter; see the block header comment).                               |
| `shadowBlur`              | `1.5`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | 0px to 40px, step 0.5px                                                                                                           | Shadow Blur (engine parameter; see the block header comment).                            |
| `shadowSpread`            | `-0.25`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                | -20px to 40px, step 0.5px                                                                                                         | Shadow Spread (engine parameter; see the block header comment).                          |
| `shadowOpacity`           | `40`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 0% to 100%, step 1%                                                                                                               | Shadow Opacity (engine parameter; see the block header comment).                         |
| `shadowColor`             | `#000000`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | color                                                                                                                             | Shadow Color (engine parameter; see the block header comment).                           |
| `borderRadius`            | `32`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 0px to 200px, step 1px                                                                                                            | Card corner radius in px at 1080.                                                        |
| `easing`                  | `smooth`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               | `custom`, `smooth`, `natural`, `slowdown`, `snappy`, `accelerate`, `elastic`, `bounce`, `overshoot`, `impulse`, `swing`, `linear` | Easing family for stepped motion.                                                        |
| `easeBezier`              | `0.50,0.00,0.50,1.00`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | string                                                                                                                            | Cubic-bezier control points for custom easing.                                           |
| `hold`                    | `55`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 0% to 100%, step 1%                                                                                                               | Hold (engine parameter; see the block header comment).                                   |
| `stagger`                 | `60`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 0 to 120, step 1                                                                                                                  | Stagger (engine parameter; see the block header comment).                                |
| `padding`                 | `6`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 0px to 100px, step 1px                                                                                                            | Padding (engine parameter; see the block header comment).                                |
| `lift`                    | `1.8`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | 0 to 4, step 0.1                                                                                                                  | Lift (engine parameter; see the block header comment).                                   |
| `activeScale`             | `108`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | 0 to 216, step 10                                                                                                                 | Active Scale (engine parameter; see the block header comment).                           |
| `gap`                     | `2`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 0px to 10px, step 0.1px                                                                                                           | Spacing between cards.                                                                   |
| `heroOpacity`             | `55`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 0 to 110, step 1                                                                                                                  | Hero Opacity (engine parameter; see the block header comment).                           |
| `kenBurns`                | `60`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 0 to 120, step 1                                                                                                                  | Ken Burns (engine parameter; see the block header comment).                              |
| `style`                   | `grid`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | `grid`, `blinds`                                                                                                                  | Style (engine parameter; see the block header comment).                                  |
| `pattern`                 | `normal`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               | `normal`, `diagonal`, `radial`, `spiral`, `random`                                                                                | Pattern (engine parameter; see the block header comment).                                |
| `orientation`             | `horizontal`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | `horizontal`, `vertical`                                                                                                          | Orientation (engine parameter; see the block header comment).                            |
| `openFrom`                | `start`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                | `start`, `end`, `center`, `alternate`                                                                                             | Open From (engine parameter; see the block header comment).                              |
| `rows`                    | `4`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 0 to 10, step 0.1                                                                                                                 | Rows (engine parameter; see the block header comment).                                   |
| `columns`                 | `4`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 0 to 10, step 0.1                                                                                                                 | Columns (engine parameter; see the block header comment).                                |
| `slats`                   | `8`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 0 to 16, step 0.1                                                                                                                 | Slats (engine parameter; see the block header comment).                                  |
| `image1`                  | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1050' viewBox%3D'0 0 1400 1050'%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1046' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 778.05H621.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M286.65 778.05L379.05 662.55L471.45 778.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'552.3' cy%3D'674.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E`                                   | image                                                                                                                             | Image on card 1 of 8. Any aspect; fitted per mediaFit.                                   |
| `image2`                  | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'788' viewBox%3D'0 0 1400 788'%3E%3Crect width%3D'1400' height%3D'788' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'788' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'784' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 583.908H529.376' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'12.382857142857144' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M278.004 583.908L347.348 497.228L416.692 583.908Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'477.36800000000005' cy%3D'505.896' r%3D'26.004' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E` | image                                                                                                                             | Image on card 2 of 8. Any aspect; fitted per mediaFit.                                   |
| `image3`                  | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1050' height%3D'1400' viewBox%3D'0 0 1050 1400'%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1046' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M189 995.05H558.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M223.65 995.05L316.05 879.55L408.45 995.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'489.3' cy%3D'891.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E`                                   | image                                                                                                                             | Image on card 3 of 8. Any aspect; fitted per mediaFit.                                   |
| `image4`                  | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1400' viewBox%3D'0 0 1400 1400'%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 1037.4H744.8' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'22' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M298.2 1037.4L421.4 883.4L544.5999999999999 1037.4Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'652.4000000000001' cy%3D'898.8' r%3D'46.199999999999996' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E`    | image                                                                                                                             | Image on card 4 of 8. Any aspect; fitted per mediaFit.                                   |
| `image5`                  | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1050' viewBox%3D'0 0 1400 1050'%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1046' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 778.05H621.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M286.65 778.05L379.05 662.55L471.45 778.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'552.3' cy%3D'674.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E`                                   | image                                                                                                                             | Image on card 5 of 8. Any aspect; fitted per mediaFit.                                   |
| `image6`                  | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'788' viewBox%3D'0 0 1400 788'%3E%3Crect width%3D'1400' height%3D'788' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'788' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'784' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 583.908H529.376' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'12.382857142857144' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M278.004 583.908L347.348 497.228L416.692 583.908Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'477.36800000000005' cy%3D'505.896' r%3D'26.004' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E` | image                                                                                                                             | Image on card 6 of 8. Any aspect; fitted per mediaFit.                                   |
| `image7`                  | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1050' height%3D'1400' viewBox%3D'0 0 1050 1400'%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1046' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M189 995.05H558.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M223.65 995.05L316.05 879.55L408.45 995.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'489.3' cy%3D'891.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E`                                   | image                                                                                                                             | Image on card 7 of 8. Any aspect; fitted per mediaFit.                                   |
| `image8`                  | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1400' viewBox%3D'0 0 1400 1400'%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 1037.4H744.8' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'22' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M298.2 1037.4L421.4 883.4L544.5999999999999 1037.4Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'652.4000000000001' cy%3D'898.8' r%3D'46.199999999999996' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E`    | image                                                                                                                             | Image on card 8 of 8. Any aspect; fitted per mediaFit.                                   |

Set them with `data-variable-values` on the element that mounts it. These are the
defaults, so this behaves exactly like the preview above until you change one:

```html wrap theme={null}
<div
  data-composition-id="loop-heroreel"
  data-composition-src="compositions/loop-heroreel.html"
  data-variable-values='{"mediaFit":"crop","cropAspectRatio":"1:1","backgroundType":"gradient","backgroundGradientStart":"#111111","backgroundGradientEnd":"#444444","backgroundColor":"#0b0b0f","backgroundImage":"","blurAmount":0,"backgroundGradientNoise":0,"backgroundOpacity":1,"shadowEnabled":"false","shadowX":0,"shadowY":1,"shadowBlur":1.5,"shadowSpread":-0.25,"shadowOpacity":40,"shadowColor":"#000000","borderRadius":32,"easing":"smooth","easeBezier":"0.50,0.00,0.50,1.00","hold":55,"stagger":60,"padding":6,"lift":1.8,"activeScale":108,"gap":2,"heroOpacity":55,"kenBurns":60,"style":"grid","pattern":"normal","orientation":"horizontal","openFrom":"start","rows":4,"columns":4,"slats":8,"image1":"data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1050' viewBox%3D'0 0 1400 1050'%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1046' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 778.05H621.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M286.65 778.05L379.05 662.55L471.45 778.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'552.3' cy%3D'674.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E","image2":"data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'788' viewBox%3D'0 0 1400 788'%3E%3Crect width%3D'1400' height%3D'788' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'788' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'784' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 583.908H529.376' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'12.382857142857144' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M278.004 583.908L347.348 497.228L416.692 583.908Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'477.36800000000005' cy%3D'505.896' r%3D'26.004' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E","image3":"data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1050' height%3D'1400' viewBox%3D'0 0 1050 1400'%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1046' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M189 995.05H558.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M223.65 995.05L316.05 879.55L408.45 995.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'489.3' cy%3D'891.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E","image4":"data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1400' viewBox%3D'0 0 1400 1400'%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 1037.4H744.8' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'22' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M298.2 1037.4L421.4 883.4L544.5999999999999 1037.4Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'652.4000000000001' cy%3D'898.8' r%3D'46.199999999999996' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E","image5":"data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1050' viewBox%3D'0 0 1400 1050'%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1046' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 778.05H621.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M286.65 778.05L379.05 662.55L471.45 778.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'552.3' cy%3D'674.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E","image6":"data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'788' viewBox%3D'0 0 1400 788'%3E%3Crect width%3D'1400' height%3D'788' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'788' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'784' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 583.908H529.376' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'12.382857142857144' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M278.004 583.908L347.348 497.228L416.692 583.908Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'477.36800000000005' cy%3D'505.896' r%3D'26.004' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E","image7":"data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1050' height%3D'1400' viewBox%3D'0 0 1050 1400'%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1046' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M189 995.05H558.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M223.65 995.05L316.05 879.55L408.45 995.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'489.3' cy%3D'891.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E","image8":"data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1400' viewBox%3D'0 0 1400 1400'%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 1037.4H744.8' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'22' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M298.2 1037.4L421.4 883.4L544.5999999999999 1037.4Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'652.4000000000001' cy%3D'898.8' r%3D'46.199999999999996' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E"}'
></div>
```

## Source

<Accordion title={`loop-heroreel.html`}>
  ```html theme={null}
  <!doctype html>
  <html
    lang="en"
    data-composition-variables='[{"id":"mediaFit","type":"enum","role":"style","label":"Media · Fit","description":"Natural keeps each image&#39;s own ratio; Crop fills the card box at the media aspect below.","default":"crop","options":[{"value":"natural","label":"Natural (original ratio)"},{"value":"crop","label":"Crop"}]},{"id":"cropAspectRatio","type":"enum","role":"style","label":"Media · Aspect","description":"Card aspect used when Fit is Crop.","default":"1:1","options":[{"value":"16:9","label":"16:9"},{"value":"9:16","label":"9:16"},{"value":"1:1","label":"1:1"},{"value":"4:5","label":"4:5"},{"value":"3:2","label":"3:2"},{"value":"3:4","label":"3:4"},{"value":"2:3","label":"2:3"}]},{"id":"backgroundType","type":"enum","role":"style","label":"Background · Type","description":"Gradient (start → end colours), flat Colour, or your own Image.","default":"gradient","options":[{"value":"gradient","label":"Gradient"},{"value":"color","label":"Color"},{"value":"image","label":"Image"}]},{"id":"backgroundGradientStart","type":"color","role":"style","label":"Background · Gradient start","description":"Top colour of the gradient.","default":"#111111"},{"id":"backgroundGradientEnd","type":"color","role":"style","label":"Background · Gradient end","description":"Bottom colour of the gradient.","default":"#444444"},{"id":"backgroundColor","type":"color","role":"style","label":"Background · Color","description":"Flat colour when Type is Color; also the ground under an Image.","default":"#0b0b0f"},{"id":"backgroundImage","type":"image","role":"style","label":"Background · Image","description":"Cover-fitted background when Type is Image.","portrays":["background_image"],"default":""},{"id":"blurAmount","type":"number","role":"style","label":"Background · Blur","description":"Blur on the background image, px.","default":0,"min":0,"max":60,"step":1,"unit":"px"},{"id":"backgroundGradientNoise","type":"number","role":"style","label":"Background · Grain","description":"Film-grain overlay strength.","default":0,"min":0,"max":100,"step":1,"unit":"%"},{"id":"backgroundOpacity","type":"number","role":"style","label":"Background · Opacity","description":"Opacity of the whole background layer (0 = transparent ground).","default":1,"min":0,"max":1,"step":0.05},{"id":"shadowEnabled","type":"enum","role":"style","label":"Appearance · Shadow","description":"Shadow Enabled (engine parameter; see the block header comment).","default":"false","options":[{"value":"true","label":"On"},{"value":"false","label":"Off"}]},{"id":"shadowX","type":"number","role":"style","label":"Appearance · Shadow X","description":"Shadow X (engine parameter; see the block header comment).","default":0,"min":-40,"max":40,"step":0.5,"unit":"px"},{"id":"shadowY","type":"number","role":"style","label":"Appearance · Shadow Y","description":"Shadow Y (engine parameter; see the block header comment).","default":1,"min":-40,"max":40,"step":0.5,"unit":"px"},{"id":"shadowBlur","type":"number","role":"style","label":"Appearance · Shadow blur","description":"Shadow Blur (engine parameter; see the block header comment).","default":1.5,"min":0,"max":40,"step":0.5,"unit":"px"},{"id":"shadowSpread","type":"number","role":"style","label":"Appearance · Shadow spread","description":"Shadow Spread (engine parameter; see the block header comment).","default":-0.25,"min":-20,"max":40,"step":0.5,"unit":"px"},{"id":"shadowOpacity","type":"number","role":"style","label":"Appearance · Shadow opacity","description":"Shadow Opacity (engine parameter; see the block header comment).","default":40,"min":0,"max":100,"step":1,"unit":"%"},{"id":"shadowColor","type":"color","role":"style","label":"Appearance · Shadow colour","description":"Shadow Color (engine parameter; see the block header comment).","default":"#000000"},{"id":"borderRadius","type":"number","role":"style","label":"Appearance · Border radius","description":"Card corner radius in px at 1080.","default":32,"min":0,"max":200,"step":1,"unit":"px"},{"id":"easing","type":"enum","role":"style","label":"Animation · Easing","description":"Easing family for stepped motion.","default":"smooth","options":[{"value":"custom","label":"Custom"},{"value":"smooth","label":"Smooth"},{"value":"natural","label":"Natural"},{"value":"slowdown","label":"Slowdown"},{"value":"snappy","label":"Snappy"},{"value":"accelerate","label":"Accelerate"},{"value":"elastic","label":"Elastic"},{"value":"bounce","label":"Bounce"},{"value":"overshoot","label":"Overshoot"},{"value":"impulse","label":"Impulse"},{"value":"swing","label":"Swing"},{"value":"linear","label":"Linear"}]},{"id":"easeBezier","type":"string","role":"style","label":"Animation · Ease Bezier","description":"Cubic-bezier control points for custom easing.","default":"0.50,0.00,0.50,1.00"},{"id":"hold","type":"number","role":"style","label":"Animation · Hold","description":"Hold (engine parameter; see the block header comment).","default":55,"min":0,"max":100,"step":1,"unit":"%"},{"id":"stagger","type":"number","role":"style","label":"Animation · Stagger","description":"Stagger (engine parameter; see the block header comment).","default":60,"min":0,"max":120,"step":1},{"id":"padding","type":"number","role":"style","label":"Template options · Padding","description":"Padding (engine parameter; see the block header comment).","default":6,"min":0,"max":100,"step":1,"unit":"px"},{"id":"lift","type":"number","role":"style","label":"Template options · Lift","description":"Lift (engine parameter; see the block header comment).","default":1.8,"min":0,"max":4,"step":0.1},{"id":"activeScale","type":"number","role":"style","label":"Template options · Active Scale","description":"Active Scale (engine parameter; see the block header comment).","default":108,"min":0,"max":216,"step":10},{"id":"gap","type":"number","role":"style","label":"Template options · Gap","description":"Spacing between cards.","default":2,"min":0,"max":10,"step":0.1,"unit":"px"},{"id":"heroOpacity","type":"number","role":"style","label":"Template options · Hero Opacity","description":"Hero Opacity (engine parameter; see the block header comment).","default":55,"min":0,"max":110,"step":1},{"id":"kenBurns","type":"number","role":"style","label":"Template options · Ken Burns","description":"Ken Burns (engine parameter; see the block header comment).","default":60,"min":0,"max":120,"step":1},{"id":"style","type":"enum","role":"style","label":"Template options · Style","description":"Style (engine parameter; see the block header comment).","default":"grid","options":[{"value":"grid","label":"Grid"},{"value":"blinds","label":"Blinds"}]},{"id":"pattern","type":"enum","role":"style","label":"Template options · Pattern","description":"Pattern (engine parameter; see the block header comment).","default":"normal","options":[{"value":"normal","label":"Normal"},{"value":"diagonal","label":"Diagonal"},{"value":"radial","label":"Radial"},{"value":"spiral","label":"Spiral"},{"value":"random","label":"Random"}]},{"id":"orientation","type":"enum","role":"style","label":"Template options · Orientation","description":"Orientation (engine parameter; see the block header comment).","default":"horizontal","options":[{"value":"horizontal","label":"Horizontal"},{"value":"vertical","label":"Vertical"}]},{"id":"openFrom","type":"enum","role":"style","label":"Template options · Open From","description":"Open From (engine parameter; see the block header comment).","default":"start","options":[{"value":"start","label":"Start"},{"value":"end","label":"End"},{"value":"center","label":"Center"},{"value":"alternate","label":"Alternate"}]},{"id":"rows","type":"number","role":"style","label":"Template options · Rows","description":"Rows (engine parameter; see the block header comment).","default":4,"min":0,"max":10,"step":0.1},{"id":"columns","type":"number","role":"style","label":"Template options · Columns","description":"Columns (engine parameter; see the block header comment).","default":4,"min":0,"max":10,"step":0.1},{"id":"slats","type":"number","role":"style","label":"Template options · Slats","description":"Slats (engine parameter; see the block header comment).","default":8,"min":0,"max":16,"step":0.1},{"id":"image1","type":"image","role":"content","label":"Media · Image 1","description":"Image on card 1 of 8. 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  >
    <head>
      <title>loop-heroreel</title>
      <meta charset="UTF-8" />
      <meta name="viewport" content="width=1080, height=1080" />
      <script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
      <style>
        * {
          margin: 0;
          padding: 0;
          box-sizing: border-box;
        }
        html,
        body {
          width: 1080px;
          height: 1080px;
          overflow: hidden;
          background: #0b0b0f;
        }
        #loop-heroreel-bg {
          position: absolute;
          inset: 0;
        }
        #loop-heroreel-hero {
          position: absolute;
          inset: 0;
          overflow: hidden;
        }
        #loop-heroreel-hero .layer {
          position: absolute;
          inset: 0;
        }
        #loop-heroreel-hero .tile {
          position: absolute;
          overflow: hidden;
        }
        #loop-heroreel-hero img {
          position: absolute;
          left: 0;
          top: 0;
          width: 1080px;
          height: 1080px;
          object-fit: cover;
        }
        #loop-heroreel-row {
          position: absolute;
          left: 0;
          top: 0;
        }
        .card img {
          display: block;
        }
      </style>
    </head>
    <body>
      <div
        id="loop-heroreel-root"
        data-composition-id="loop-heroreel"
        data-start="0"
        data-width="1080"
        data-height="1080"
        data-duration="10"
      >
        <div
          id="loop-heroreel-loop"
          class="clip"
          data-start="0"
          data-duration="10"
          data-track-index="1"
          data-layout-allow-overflow
        >
          <div id="loop-heroreel-bg"></div>
          <div id="loop-heroreel-hero">
            <div class="layer" id="loop-heroreel-base"></div>
            <div class="layer" id="loop-heroreel-wipe"></div>
          </div>
          <div id="loop-heroreel-row"></div>
        </div>
      </div>
      <script>
        // Shared runtime for the the reference tool loop ports. Loaded by every family engine.
        // Everything here is a pure function of the HyperFrames variables + t.
        //
        // Reference constants (measured on the 512x512 preview library, 2026-09-08):
        //   Marquee planeSize -> 0.3% of frame height per unit (7 variants, all 1.54px/unit @512)
        //   Marquee gap       -> 0.2% of frame height per unit
        //   3D perspective    -> CSS focal length f = 1000px * (100/perspective) at H=1080
        //                        (3D01/02/08/11: card widths & far-card spacing match to <3%)
        // Both are calibrated on a SQUARE canvas; for 16:9 we scale by H. ponytail: if the
        // dashboard 16:9 reference shows width-relative scaling, flip REF below to W.
        window.RF = (() => {
          // Variables are injected by the inline script via RF.use(): HyperFrames wraps INLINE scripts in a
          // per-composition scope where getVariables() resolves; this external file only sees the host window.
          const V = {},
            MEDIA = [];
          const use = (vars, media) => {
            Object.assign(V, vars || {});
            MEDIA.splice(0, MEDIA.length, ...(media || []));
          };
          const root = document.querySelector("[data-composition-id]");
          const W = +root.dataset.width,
            H = +root.dataset.height;
          const REF = H;
          const num = (k, d) => (V[k] !== undefined && V[k] !== "" && !isNaN(+V[k]) ? +V[k] : d);
          const str = (k, d) => (V[k] !== undefined && V[k] !== "" ? String(V[k]) : d);
          const on = (k, d) => /^(true|on|1)$/i.test(str(k, d ? "on" : "off")); // spec booleans arrive as "true"/"false", enums as on/off

          function pick(n) {
            n = Math.max(1, Math.min(MEDIA.length, n | 0));
            return MEDIA.slice(0, n);
          }
          // aspect (w/h) a card takes for a media item under mediaFit + cropAspectRatio
          function aspect(m, fit, cropAR) {
            if (fit === "natural") return m.w / m.h;
            const [a, b] = String(cropAR || "1:1")
              .split(":")
              .map(Number);
            return a && b ? a / b : 1;
          }
          function card(m, w, h, radius) {
            const el = document.createElement("div");
            el.className = "card";
            el.style.cssText = `position:absolute;width:${w}px;height:${h}px;overflow:hidden;border-radius:${radius}px;`;
            const img = document.createElement("img");
            img.src = m.src;
            img.width = Math.round(w);
            img.height = Math.round(h);
            img.style.cssText = `display:block;width:${w}px;height:${h}px;object-fit:cover;`;
            el.appendChild(img);
            return el;
          }
          function background(el) {
            // the editor's Background panel: type gradient | color | image, gradient start/end, grain (noise %), opacity, image blur
            const type = str("backgroundType", "gradient");
            const c = str("backgroundColor", "#0b0b0f");
            el.style.background = c;
            if (type === "gradient") {
              const g1 = str("backgroundGradientStart", "#111111"),
                g2 = str("backgroundGradientEnd", "#444444");
              el.style.background = `linear-gradient(180deg, ${g1}, ${g2})`;
            } else if (type === "image") {
              const im = V.backgroundImage,
                src = im && typeof im === "object" ? im.url || im.src || "" : im || "";
              if (src) {
                el.style.background = `${c} url("${src}") center / cover no-repeat`;
                const b = num("blurAmount", 0);
                if (b > 0) el.style.filter = `blur(${b}px)`;
              }
            }
            el.style.opacity = String(Math.max(0, Math.min(1, num("backgroundOpacity", 1))));
            const noise = num("backgroundGradientNoise", 0);
            if (noise > 0) {
              const g = document.createElement("div");
              g.style.cssText = `position:absolute;inset:0;pointer-events:none;mix-blend-mode:overlay;opacity:${((noise / 100) * 0.7).toFixed(3)};background:url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20width%3D'256'%20height%3D'256'%3E%3Cfilter%20id%3D'n'%3E%3CfeTurbulence%20type%3D'fractalNoise'%20baseFrequency%3D'0.9'%20numOctaves%3D'3'%20stitchTiles%3D'stitch'%20seed%3D'7'%2F%3E%3CfeColorMatrix%20values%3D'0%200%200%200%200.5%200%200%200%200%200.5%200%200%200%200%200.5%200%200%200%201%200'%2F%3E%3C%2Ffilter%3E%3Crect%20width%3D'256'%20height%3D'256'%20filter%3D'url(%23n)'%2F%3E%3C%2Fsvg%3E") 0 0 / 256px 256px repeat`;
              el.appendChild(g);
            }
          }
          const expoInOut = (x) =>
            x <= 0
              ? 0
              : x >= 1
                ? 1
                : x < 0.5
                  ? Math.pow(2, 20 * x - 10) / 2
                  : (2 - Math.pow(2, -20 * x + 10)) / 2;
          const frac = (x) => x - Math.floor(x);
          return {
            V,
            use,
            W,
            H,
            REF,
            num,
            str,
            on,
            MEDIA,
            pick,
            aspect,
            card,
            background,
            expoInOut,
            frac,
          };
        })();
      </script>
      <script>
        (async () => {
          // Banner loop family — a row of N thumbnails (vertically centred), the active one lifted and
          // scaled, over a full-frame backdrop of the active image at heroOpacity with a slow Ken Burns zoom; each step the
          // backdrop wipes to the next image through a grid of scaling tiles (style=grid) or slats (style=blinds), staggered.
          // Measured (512 preview, 8 images, step 37.5 f): thumbs 48 px square at pitch 58 (gap 2% of H = 10.2), first at x 29
          // (padding 6% = 30.7) -> thumb = (W - 2*pad - (N-1)*gap)/N; row centre y 256 = H/2; active 51 px (x1.08) lifted 9.5 px
          // (lift 1.8% of H); backdrop luma 53 = 0.55*thumb + 0.45*bg (heroOpacity 55). Wipe: 4x4 cells, hold until f~22.5 of
          // 37.5 (hold 55%), cell (0,0) opens f23, (3,3) f32.5 -> stagger span ~10 f = 60% of the 17-f wipe window, each tile
          // grows from its centre over the remaining ~7 f, row-major (pattern=normal); the active thumb changes over the same
          // window (f24..32). Tiles/hard edges have no visible rounding.
          // Knobs (unmeasured): kenBurns = zoom of kenBurns/1000 (60 -> 6%) over one image's display; patterns diagonal/radial/
          // spiral/random and openFrom end/center/alternate are orderings only; blinds = `slats` strips along `orientation`;
          // speedVariation ignored; shadow units 1% of H; the wipe tiles are square-cut (borderRadius applies to thumbs only).
          // media list [{src,w,h}] is inlined by build.mjs; HyperFrames scopes inline scripts, so hand both to the shared lib explicitly
          const __V = Object.assign(
            {},
            (window.__hyperframes && window.__hyperframes.getVariables
              ? window.__hyperframes.getVariables()
              : null) || {},
            { loopDuration: 10, loopRepeat: 2, imageCount: 8 },
          );
          const __PH = [
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            "data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'788' viewBox%3D'0 0 1400 788'%3E%3Crect width%3D'1400' height%3D'788' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'788' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'784' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 583.908H529.376' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'12.382857142857144' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M278.004 583.908L347.348 497.228L416.692 583.908Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'477.36800000000005' cy%3D'505.896' r%3D'26.004' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E",
            "data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1050' height%3D'1400' viewBox%3D'0 0 1050 1400'%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1046' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M189 995.05H558.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M223.65 995.05L316.05 879.55L408.45 995.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'489.3' cy%3D'891.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E",
            "data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1400' viewBox%3D'0 0 1400 1400'%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 1037.4H744.8' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'22' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M298.2 1037.4L421.4 883.4L544.5999999999999 1037.4Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'652.4000000000001' cy%3D'898.8' r%3D'46.199999999999996' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E",
            "data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1050' viewBox%3D'0 0 1400 1050'%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1046' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 778.05H621.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M286.65 778.05L379.05 662.55L471.45 778.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'552.3' cy%3D'674.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E",
            "data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'788' viewBox%3D'0 0 1400 788'%3E%3Crect width%3D'1400' height%3D'788' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'788' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'784' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 583.908H529.376' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'12.382857142857144' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M278.004 583.908L347.348 497.228L416.692 583.908Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'477.36800000000005' cy%3D'505.896' r%3D'26.004' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E",
            "data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1050' height%3D'1400' viewBox%3D'0 0 1050 1400'%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1046' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M189 995.05H558.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M223.65 995.05L316.05 879.55L408.45 995.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'489.3' cy%3D'891.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E",
            "data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1400' viewBox%3D'0 0 1400 1400'%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 1037.4H744.8' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'22' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M298.2 1037.4L421.4 883.4L544.5999999999999 1037.4Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'652.4000000000001' cy%3D'898.8' r%3D'46.199999999999996' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E",
          ];
          const __MEDIA = await Promise.all(
            ["image1", "image2", "image3", "image4", "image5", "image6", "image7", "image8"].map(
              async (id, i) => {
                const v = __V[id];
                const src = (v && typeof v === "object" ? v.url || v.src : v) || __PH[i];
                const img = new Image();
                img.src = src;
                try {
                  await img.decode();
                } catch (e) {}
                return { src, w: img.naturalWidth || 1400, h: img.naturalHeight || 1050 };
              },
            ),
          );
          RF.use(__V, __MEDIA);
          const { W, H, REF, num, str, pick, aspect, card, background, frac } = RF;
          const bool = (k, d) => /^(true|on|1)$/i.test(str(k, d ? "true" : "false"));
          const DUR = num("loopDuration", 10);
          const FIT = str("mediaFit", "crop");
          const CROP_AR = str("cropAspectRatio", "1:1");
          const PAD = (num("padding", 6) / 100) * REF;
          const GAP = (num("gap", 2) / 100) * REF;
          const LIFT = (num("lift", 1.8) / 100) * REF;
          const ASCALE = num("activeScale", 108) / 100;
          const HOP = num("heroOpacity", 55) / 100;
          const KB = num("kenBurns", 60) / 1000;
          const HOLD = Math.min(0.95, Math.max(0, num("hold", 55) / 100));
          const STYLE = str("style", "grid");
          const PATTERN = str("pattern", "normal");
          const HORIZ = str("orientation", "horizontal") === "horizontal";
          const OPEN = str("openFrom", "start");
          const ROWS = Math.max(1, num("rows", 4) | 0),
            COLS = Math.max(1, num("columns", 4) | 0),
            SLATS = Math.max(1, num("slats", 8) | 0);
          const STAG = Math.min(0.95, Math.max(0, num("stagger", 60) / 100));
          const RADIUS = (num("borderRadius", 32) * REF) / 1080;
          const IMAGES = pick(num("imageCount", 16));
          const N = IMAGES.length;

          const bezier = (x1, y1, x2, y2) => (x) => {
            if (x <= 0) return 0;
            if (x >= 1) return 1;
            let lo = 0,
              hi = 1,
              s = 0.5;
            for (let i = 0; i < 24; i++) {
              s = (lo + hi) / 2;
              const bx = 3 * (1 - s) * (1 - s) * s * x1 + 3 * (1 - s) * s * s * x2 + s * s * s;
              if (bx < x) lo = s;
              else hi = s;
            }
            return 3 * (1 - s) * (1 - s) * s * y1 + 3 * (1 - s) * s * s * y2 + s * s * s;
          };
          const EASES = {
            smooth: [0.5, 0, 0.5, 1],
            linear: [0, 0, 1, 1],
            slowdown: [0, 0, 0.2, 1],
            accelerate: [0.4, 0, 1, 1],
            natural: [0.25, 0.1, 0.25, 1],
            snappy: [0.4, 0, 0.2, 1],
          };
          const eName = str("easing", "smooth");
          const ease = bezier(
            ...(eName === "custom"
              ? str("easeBezier", "0.50,0.00,0.50,1.00").split(",").map(Number)
              : EASES[eName] || EASES.smooth),
          );
          const clamp01 = (x) => Math.min(1, Math.max(0, x));

          document.getElementById("loop-heroreel-loop").dataset.duration = DUR;
          background(document.getElementById("loop-heroreel-bg"));
          const hero = document.getElementById("loop-heroreel-hero");
          hero.style.opacity = HOP;
          const shadow = bool("shadowEnabled", false)
            ? `${(num("shadowX", 0) * REF) / 100}px ${(num("shadowY", 1) * REF) / 100}px ${(num("shadowBlur", 1.5) * REF) / 100}px ${(num("shadowSpread", -0.25) * REF) / 100}px ${str("shadowColor", "#000000")}${Math.round(
                num("shadowOpacity", 40) * 2.55,
              )
                .toString(16)
                .padStart(2, "0")}`
            : "";

          // --- backdrop: base layer (one img per image) + wipe tiles (each tile holds one img per image) ---
          const base = document.getElementById("loop-heroreel-base"),
            wipe = document.getElementById("loop-heroreel-wipe");
          const baseImgs = IMAGES.map((m) => {
            const im = document.createElement("img");
            im.src = m.src;
            base.appendChild(im);
            return im;
          });
          // tile rects [x,y,w,h] + order index
          const rects = [];
          if (STYLE === "blinds") {
            for (let i = 0; i < SLATS; i++)
              rects.push(
                HORIZ
                  ? [0, (i * H) / SLATS, W, H / SLATS, 0, i]
                  : [(i * W) / SLATS, 0, W / SLATS, H, i, 0],
              );
          } else {
            for (let r = 0; r < ROWS; r++)
              for (let c = 0; c < COLS; c++)
                rects.push([(c * W) / COLS, (r * H) / ROWS, W / COLS, H / ROWS, c, r]);
          }
          // ordering key per pattern (lower opens first)
          const T = rects.length;
          let seed = 1234567;
          const rnd = () => (seed = (seed * 1103515245 + 12345) & 0x7fffffff) / 0x7fffffff; // fixed-seed LCG
          const cR = (ROWS - 1) / 2,
            cC = (COLS - 1) / 2;
          const spiral = (() => {
            // row-major indices in clockwise spiral order
            const g = Array.from({ length: ROWS }, () => Array(COLS).fill(-1));
            let k = 0,
              r0 = 0,
              r1 = ROWS - 1,
              c0 = 0,
              c1 = COLS - 1;
            while (r0 <= r1 && c0 <= c1) {
              for (let c = c0; c <= c1; c++) g[r0][c] = k++;
              for (let r = r0 + 1; r <= r1; r++) g[r][c1] = k++;
              if (r0 < r1) for (let c = c1 - 1; c >= c0; c--) g[r1][c] = k++;
              if (c0 < c1) for (let r = r1 - 1; r > r0; r--) g[r][c0] = k++;
              r0++;
              r1--;
              c0++;
              c1--;
            }
            return g;
          })();
          let keys = rects.map((rc, i) => {
            const [, , , , c, r] = rc;
            if (STYLE === "blinds") return i;
            if (PATTERN === "diagonal") return r + c;
            if (PATTERN === "radial") return Math.hypot(r - cR, c - cC);
            if (PATTERN === "spiral") return spiral[r][c];
            if (PATTERN === "random") return rnd();
            return i;
          });
          // rank -> normalised start 0..1
          const sorted = keys
            .map((k, i) => [k, i])
            .sort((a, b) => a[0] - b[0])
            .map((p) => p[1]);
          let rank = new Array(T);
          sorted.forEach((i, ri) => (rank[i] = ri));
          if (OPEN === "end") rank = rank.map((r) => T - 1 - r);
          else if (OPEN === "center") rank = rank.map((r) => Math.abs(r - (T - 1) / 2) * 2);
          else if (OPEN === "alternate")
            rank = rank.map((r) => (r % 2 === 0 ? r / 2 : T - 1 - (r - 1) / 2));
          const maxRank = Math.max(1, ...rank);
          const tiles = rects.map((rc, i) => {
            const [x, y, w, h] = rc;
            const el = document.createElement("div");
            el.className = "tile";
            el.style.cssText = `left:${x}px;top:${y}px;width:${w}px;height:${h}px;transform-origin:50% 50%;`;
            const imgs = IMAGES.map((m) => {
              const im = document.createElement("img");
              im.src = m.src;
              im.style.left = -x + "px";
              im.style.top = -y + "px";
              im.style.display = "none";
              el.appendChild(im);
              return im;
            });
            wipe.appendChild(el);
            return { el, imgs, start: (rank[i] / maxRank) * STAG };
          });

          // --- thumb row ---
          const row = document.getElementById("loop-heroreel-row");
          const aspects = IMAGES.map((m) => aspect(m, FIT, CROP_AR));
          const TH = (W - 2 * PAD - (N - 1) * GAP) / aspects.reduce((s, a) => s + a, 0); // thumb height
          const thumbs = [];
          let x = PAD;
          IMAGES.forEach((m, i) => {
            const w = TH * aspects[i];
            const c = card(m, w, TH, RADIUS);
            c.style.left = x + "px";
            c.style.top = (H - TH) / 2 + "px";
            c.style.transformOrigin = "50% 50%";
            if (shadow) c.style.boxShadow = shadow;
            row.appendChild(c);
            thumbs.push(c);
            x += w + GAP;
          });

          function renderAt(t) {
            const s = frac(t) * N,
              k = Math.floor(s),
              u = s - k;
            const cur = k % N,
              nxt = (k + 1) % N;
            const wv = clamp01((u - HOLD) / (1 - HOLD)); // wipe progress 0..1 in the post-hold window
            const zoom = (i, start) => 1 + KB * Math.max(0, s - start); // ken burns: grows from the image's wipe start
            // base = current image, zoom since its own wipe started at (k - 1 + HOLD)
            baseImgs.forEach((im, i) => {
              im.style.display = i === cur ? "" : "none";
            });
            baseImgs[cur].style.transform = `scale(${zoom(cur, k - 1 + HOLD)})`;
            // wipe tiles show the next image
            for (const tl of tiles) {
              const p = wv <= 0 ? 0 : ease(clamp01((wv - tl.start) / Math.max(0.02, 1 - STAG)));
              tl.imgs.forEach((im, i) => {
                im.style.display = i === nxt && p > 0 ? "" : "none";
              });
              tl.el.style.transform =
                STYLE === "blinds" ? (HORIZ ? `scaleY(${p})` : `scaleX(${p})`) : `scale(${p})`;
              if (p > 0) tl.imgs[nxt].style.transform = `scale(${zoom(nxt, k + HOLD)})`;
            }
            // thumbs: active lifts; hand-over during the first quarter after the hold
            const hv = ease(clamp01((u - HOLD) / 0.25));
            thumbs.forEach((c, i) => {
              const a = i === cur ? 1 - hv : i === nxt ? hv : 0;
              c.style.transform = `translateY(${-LIFT * a}px) scale(${1 + (ASCALE - 1) * a})`;
              c.style.zIndex = a > 0 ? 2 : 1;
            });
          }
          // one paused linear tween drives t; every frame is recomputed from t alone (seek-safe)
          const state = { t: 0 };
          const tl = gsap.timeline({ paused: true });
          tl.to(state, { t: 1, duration: DUR, ease: "none", onUpdate: () => renderAt(state.t) }, 0);
          renderAt(0);
          window.__timelines = window.__timelines || {};
          window.__timelines["loop-heroreel"] = tl;
        })();
      </script>
    </body>
  </html>
  ```
</Accordion>

Tagged `loop` `images` `showcase` `gallery` `heroreel`.

Created by Miao Yang.

## Related topics

* [Browse the complete Catalog](/catalog)
* [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
* [Build a richer composition](/go-further)
