> ## 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 Card Totem

> One vertical strip of image cards glides upward through the frame centre. 8 image slots, 12s 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-cardtotem.mp4" poster="https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/loop-cardtotem.png" autoPlay muted loop playsInline />

## Install

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

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

## Add it to your video

It runs for 12 seconds at 1080×1080. Paste this into your composition:

```html index.html theme={null}
<div
  data-composition-id="loop-cardtotem"
  data-composition-src="compositions/loop-cardtotem.html"
  data-start="0"
  data-duration="12"
  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`                | `natural`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | `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).                          |
| `scaleIntensity`          | `0.34`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | 0 to 1, step 0.05                                                                                                                 | Strength of the size change.                                                             |
| `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.                                           |
| `motion`                  | `flow`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | `flow`, `steps`                                                                                                                   | Motion (engine parameter; see the block header comment).                                 |
| `gap`                     | `2.5`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | 0px to 5px, step 0.1px                                                                                                            | Spacing between cards.                                                                   |
| `curve`                   | `70`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 0 to 140, step 1                                                                                                                  | Curve (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-cardtotem"
  data-composition-src="compositions/loop-cardtotem.html"
  data-variable-values='{"mediaFit":"natural","cropAspectRatio":"1:1","backgroundType":"gradient","backgroundGradientStart":"#111111","backgroundGradientEnd":"#444444","backgroundColor":"#0b0b0f","backgroundImage":"","blurAmount":0,"backgroundGradientNoise":0,"backgroundOpacity":1,"scaleIntensity":0.34,"borderRadius":32,"easing":"smooth","easeBezier":"0.50,0.00,0.50,1.00","motion":"flow","gap":2.5,"curve":70,"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 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></div>
```

## Source

<Accordion title={`loop-cardtotem.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":"natural","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":"scaleIntensity","type":"number","role":"style","label":"Appearance · Media scale","description":"Strength of the size change.","default":0.34,"min":0,"max":1,"step":0.05},{"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":"motion","type":"enum","role":"style","label":"Animation · Motion","description":"Motion (engine parameter; see the block header comment).","default":"flow","options":[{"value":"flow","label":"Flow"},{"value":"steps","label":"Steps"}]},{"id":"gap","type":"number","role":"style","label":"Template options · Gap","description":"Spacing between cards.","default":2.5,"min":0,"max":5,"step":0.1,"unit":"px"},{"id":"curve","type":"number","role":"style","label":"Template options · Curve","description":"Curve (engine parameter; see the block header comment).","default":70,"min":0,"max":140,"step":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-cardtotem</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-cardtotem-bg {
          position: absolute;
          inset: 0;
        }
        #loop-cardtotem-stage {
          position: absolute;
          inset: 0;
          perspective-origin: 50% 50%;
        }
        /* never put opacity/filter in will-change on preserve-3d elements: it flattens them silently */
        #loop-cardtotem-rail {
          position: absolute;
          left: 50%;
          top: 50%;
          width: 0;
          height: 0;
          transform-style: preserve-3d;
        }
        .card img {
          display: block;
        }
      </style>
    </head>
    <body>
      <div
        id="loop-cardtotem-root"
        data-composition-id="loop-cardtotem"
        data-start="0"
        data-width="1080"
        data-height="1080"
        data-duration="12"
      >
        <div
          id="loop-cardtotem-loop"
          class="clip"
          data-start="0"
          data-duration="12"
          data-track-index="1"
          data-layout-allow-overflow
        >
          <div id="loop-cardtotem-bg"></div>
          <div id="loop-cardtotem-stage"><div id="loop-cardtotem-rail"></div></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 () => {
          // CardTotem loop family (Spine, LoopCardTotemTemplate) — ONE vertical strip of cards gliding up through the
          // centre along a convex circular rail (centre card flat, cards above/below tilt away and shrink).
          // Measured on the 512 preview (2026-09-08): centre card 172-174 px = scaleIntensity·H (0.34·512; FilmStrip's
          // 0.32 gives its 164 ⇒ scaleIntensity IS the card size in H), pitch 185 (gap 2.5 ⇒ 13 px ⇒ 1.0% H/unit);
          // motion=flow: constant velocity, exactly one pitch per 45 frames (8 crossings / 12 s ⇒ N pitches per loop);
          // the top card's inner edge is the same width as the centre card (173) while the (off-screen) outer edge recedes
          // ⇒ tilt hinges near the inner edge: a circular rail with the card tilted MORE than the tangent. FilmStrip's
          // side card gives outer/inner edge heights 145/162 at 168 px off-centre: rail R=1.414H, f=1.17H and tilt gain
          // 1.75 (tangent-only rails fit to rms 3 px and under-keystone). Knobs: TILT_GAIN, curve⇒R = 1.414H·70/curve
          // (only 70 seen). motion=steps: one pitch per N-th of the loop with the named easing (gsap eases; custom ⇒
          // easeBezier via a small cubic-bezier solver) — no preview exercises it.
          // 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: 12, 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'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 VERT = true; // CardTotem: vertical strip (filmstrip.html flips this)
          const DUR = num("loopDuration", 12);
          const FIT = str("mediaFit", "natural");
          const CROP_AR = str("cropAspectRatio", "1:1");
          const EASING = str("easing", "smooth");
          const BEZ = str("easeBezier", "0.50,0.00,0.50,1.00").split(",").map(Number);
          const SIZE = num("scaleIntensity", 0.34) * REF; // card size across the strip
          const GAP = num("gap", 2.5) * 0.0102 * REF;
          const CURVE = Math.max(1, num("curve", 70));
          const STEPS = str("motion", "flow") === "steps";
          const RADIUS = (num("borderRadius", 32) * REF) / 1080;
          const IMAGES = pick(num("imageCount", 16));
          const N = IMAGES.length;
          const TILT_GAIN = 1.75; // measured keystone exceeds the rail tangent

          document.getElementById("loop-cardtotem-loop").dataset.duration = DUR;
          background(document.getElementById("loop-cardtotem-bg"));

          const f = 1.17 * REF,
            R = (1.414 * REF * 70) / CURVE;
          const stage = document.getElementById("loop-cardtotem-stage");
          stage.style.perspective = f + "px";
          const rail = document.getElementById("loop-cardtotem-rail");

          // cubic-bezier(x1,y1,x2,y2) y(x) by bisection — only for easing=custom
          function bezier(x1, y1, x2, y2) {
            const B = (a, b, s) =>
              3 * (1 - s) * (1 - s) * s * a + 3 * (1 - s) * s * s * b + s * s * s;
            return (x) => {
              let lo = 0,
                hi = 1;
              for (let i = 0; i < 30; i++) {
                const mid = (lo + hi) / 2;
                if (B(x1, x2, mid) < x) lo = mid;
                else hi = mid;
              }
              return B(y1, y2, (lo + hi) / 2);
            };
          }
          const EASES = {
            smooth: "power2.inOut",
            natural: "power1.inOut",
            slowdown: "power3.out",
            snappy: "power4.inOut",
            accelerate: "power2.in",
            elastic: "elastic.out(1,0.5)",
            bounce: "bounce.out",
            overshoot: "back.out(1.7)",
            impulse: "expo.out",
            swing: "sine.inOut",
            linear: "none",
          };
          const ease =
            EASING === "custom" ? bezier(...BEZ) : gsap.parseEase(EASES[EASING] || "power2.inOut");

          const items = [];
          let pos = 0;
          for (let k = 0; k < N; k++) {
            const m = IMAGES[k],
              a = aspect(m, FIT, CROP_AR);
            const w = VERT ? SIZE : SIZE * a,
              h = VERT ? SIZE / a : SIZE; // fixed across the strip, aspect along it
            const along = VERT ? h : w;
            const el = card(m, w, h, RADIUS);
            el.style.left = -w / 2 + "px";
            el.style.top = -h / 2 + "px";
            rail.appendChild(el);
            items.push({ el, c: pos + along / 2, pitch: along + GAP });
            pos += along + GAP;
          }
          const L = pos; // strip period (world px)
          const RAD = 180 / Math.PI;
          function travel(t) {
            // world px moved along the strip
            if (!STEPS) return L * t;
            const u = t * N,
              k = Math.floor(u),
              g = u - k;
            let d = 0;
            for (let j = 0; j < k; j++) d += items[j % N].pitch;
            return d + items[k % N].pitch * ease(g);
          }
          function renderAt(t) {
            const s = travel(t);
            for (const it of items) {
              const p = frac((it.c - s) / L + 0.5) * L - L / 2; // rail arc position, 0 = frame centre; up/left = decreasing
              const th = p / R;
              if (Math.abs(th) > 1.4) {
                it.el.style.display = "none";
                continue;
              }
              it.el.style.display = "";
              const u = R * Math.sin(th),
                z = -R * (1 - Math.cos(th));
              it.el.style.transform = VERT
                ? `translate3d(0,${u}px,${z}px) rotateX(${-TILT_GAIN * th * RAD}deg)`
                : `translate3d(${u}px,0,${z}px) rotateY(${TILT_GAIN * th * RAD}deg)`;
            }
          }
          // 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-cardtotem"] = tl;
        })();
      </script>
    </body>
  </html>
  ```
</Accordion>

Tagged `loop` `images` `showcase` `gallery` `cardtotem` `3d`.

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)
