> ## Documentation Index
> Fetch the complete documentation index at: https://hyperframes-fix-nested-composition-media-inpoint.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Scribble Transition

> Overlay transition: scribble bands accumulate to cover the frame with a solid backstop, the host cuts beneath, and the scribble clears

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>;
};

<iframe className="w-full aspect-video rounded-xl border-0 bg-zinc-100 dark:bg-zinc-800" title="hw-scribble-transition preview" loading="lazy" srcDoc={`<!doctype html><html><head><meta charset="utf-8"><style>html,body{margin:0;height:100%;overflow:hidden;background:transparent}hyperframes-player{display:block;width:100%;height:100%}</style><script src="https://cdn.jsdelivr.net/npm/@hyperframes/player@0.7/dist/hyperframes-player.global.js"><\/script></head><body><script>fetch("/public/catalog/blocks/hw-scribble-transition.json").then(function(r){return r.json()}).then(function(d){var p=document.createElement("hyperframes-player");p.setAttribute("srcdoc",d.html);p.setAttribute("controls","");p.setAttribute("autoplay","");p.setAttribute("loop","");p.setAttribute("muted","");p.setAttribute("poster","https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/hw-scribble-transition.png");document.body.appendChild(p)});<\/script></body></html>`} />

## Install

<InstallCommand command="npx hyperframes add hw-scribble-transition" item="hw-scribble-transition" />

That writes one file: `compositions/hw-scribble-transition.html`.

## Add it to your video

It runs for 2.2 seconds at 1920×1080. Paste this into your composition:

```html index.html theme={null}
<div
  data-composition-id="hw-scribble-transition"
  data-composition-src="compositions/hw-scribble-transition.html"
  data-start="0"
  data-duration="2.2"
  data-track-index="1"
  data-width="1920"
  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.

## Source

<Accordion title={`hw-scribble-transition.html`}>
  ```html theme={null}
  <!doctype html>
  <html lang="en">
    <head>
      <meta charset="utf-8" />
      <script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
      <style>
        *,
        *::before,
        *::after {
          margin: 0;
          padding: 0;
          box-sizing: border-box;
        }
        body {
          background: transparent;
          overflow: hidden;
        }
        #hw-st-root {
          /* Warm marker accent, consistent with the rest of the hw family.
             Override per use via CONFIG.color. */
          --hw-accent: #ffb020;

          position: relative;
          width: 1920px;
          height: 1080px;
          overflow: hidden;
          background: transparent;
        }
        #hw-st-svg {
          position: absolute;
          inset: 0;
          width: 100%;
          height: 100%;
        }
        #hw-st-svg path {
          fill: none;
          stroke: var(--hw-accent);
          stroke-linecap: round;
          stroke-linejoin: round;
        }
        /* solid backstop that guarantees full coverage at the midpoint */
        #hw-st-solid {
          position: absolute;
          inset: 0;
          background: var(--hw-accent);
          opacity: 0;
        }
      </style>
    </head>
    <body>
      <div
        id="hw-st-root"
        data-composition-id="hw-scribble-transition"
        data-start="0"
        data-duration="2.2"
        data-width="1920"
        data-height="1080"
      >
        <svg id="hw-st-svg" viewBox="0 0 1920 1080" data-layout-allow-overflow></svg>
        <div id="hw-st-solid"></div>
        <div
          id="hw-st-drv"
          class="clip"
          data-start="0"
          data-duration="2.2"
          data-track-index="0"
          style="position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none"
        ></div>
      </div>
      <script>
        (function () {
          window.__timelines = window.__timelines || {};

          /* ---- published parameters ----
             Overlay-transition (the mk-clone-wall model): fat scribble strokes
             sweep across and cover the frame, a solid backstop guarantees full
             coverage at the midpoint (the host hard-cuts beneath, ~0.9-1.4s
             local), then everything clears. Place spanning the host's cut. */
          var CONFIG = {
            color: null, // css color; null = --hw-accent (warm marker)
            bands: 7, // horizontal scribble bands
            strokeScale: 1.0,
            seed: 17,
          };

          var W = 1920,
            H = 1080,
            DUR = 2.2;

          window.hwHash = function (n, seed) {
            var x = Math.sin(n * 127.1 + (seed || 1) * 311.7) * 43758.5453;
            return (x - Math.floor(x)) * 2 - 1;
          };

          var root = document.getElementById("hw-st-root");
          if (CONFIG.color) root.style.setProperty("--hw-accent", CONFIG.color);
          var NS = "http://www.w3.org/2000/svg";
          var svg = document.getElementById("hw-st-svg");

          /* fat zigzag bands, each covering a horizontal slice edge-to-edge */
          var bandH = H / CONFIG.bands;
          var paths = [];
          for (var b = 0; b < CONFIG.bands; b++) {
            var y0 = b * bandH + bandH / 2;
            var d = "M -80 " + (y0 + window.hwHash(b * 17, CONFIG.seed) * 20).toFixed(1);
            var zigs = 7;
            for (var i = 1; i <= zigs; i++) {
              var x = (W + 160) * (i / zigs) - 80;
              var y =
                y0 + (i % 2 ? -1 : 1) * bandH * 0.32 + window.hwHash(b * 17 + i, CONFIG.seed) * 16;
              d += " L " + x.toFixed(1) + " " + y.toFixed(1);
            }
            var p = document.createElementNS(NS, "path");
            p.setAttribute("d", d);
            p.setAttribute("stroke-width", Math.ceil(bandH * 0.85 * CONFIG.strokeScale));
            p.setAttribute("id", "hw-st-band-" + b);
            svg.appendChild(p);
            paths.push(p);
          }

          var tl = gsap.timeline({ paused: true });

          /* 0-0.85: bands scribble on (staggered, alternating direction) */
          paths.forEach(function (p, i) {
            var len = p.getTotalLength();
            gsap.set(p, { strokeDasharray: len, strokeDashoffset: i % 2 ? -len : len });
            tl.to(p, { strokeDashoffset: 0, duration: 0.55, ease: "power2.in" }, 0.04 * i);
          });
          /* 0.8: solid backstop snaps in beneath the finished scribble — full
             coverage guaranteed 0.85-1.35 (the host's cut window) */
          tl.to("#hw-st-solid", { opacity: 1, duration: 0.12, ease: "none" }, 0.8);

          /* 1.35-1.95: clear — bands scribble off the other way, backstop lifts */
          tl.to("#hw-st-solid", { opacity: 0, duration: 0.15, ease: "none" }, 1.42);
          paths.forEach(function (p, i) {
            var len = p.getTotalLength();
            tl.to(
              p,
              { strokeDashoffset: i % 2 ? len : -len, duration: 0.5, ease: "power2.out" },
              1.42 + 0.035 * i,
            );
          });

          /* hard kill the moment the last band clears (learning: kill roots
             when the final fade completes, not at DUR) */
          tl.set(root, { visibility: "hidden" }, 2.17);

          window.__timelines["hw-scribble-transition"] = tl;
        })();
      </script>
    </body>
  </html>
  ```
</Accordion>

Tagged `handwritten` `transition` `wipe`.

## Related topics

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