cycle-atlas/.agents/skills/music-to-video/references/motion-primitives/mosaic-pack/scene.html

<template id="mosaic-pack-template">
  <div data-composition-id="mosaic-pack" data-width="1920" data-height="1080" data-duration="2.4">
    <style>
      :root {
        --hg-violet: #7c3aed;
        --hg-violet-2: #a855f7;
        --hg-bg: #0a0a0f;
        --hg-fg: #f5f5fa;
        --hg-dim: #6b6b78;
      }
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      .stage {
        position: absolute;
        inset: 0;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      .grid {
        display: grid;
        grid-template-columns: repeat(6, 200px);
        grid-template-rows: repeat(4, 200px);
        gap: 18px;
      }
      .tile {
        border-radius: 14px;
        will-change: transform, opacity;
      }
    </style>
    <div class="stage">
      <div class="grid" id="grid"></div>
    </div>
    <script>
      window.__timelines = window.__timelines || {};
      const tl = gsap.timeline({ paused: true });

      // Deterministic palette + grid build (6x4 = 24 cells).
      const PALETTE = ["#7c3aed", "#a855f7", "#f5f5fa", "#2a2a3a", "#b56dff", "#6b6b78"];
      const COLS = 6;
      const ROWS = 4;
      const COUNT = COLS * ROWS;
      const grid = document.getElementById("grid");
      const tiles = [];
      for (let i = 0; i < COUNT; i++) {
        const tile = document.createElement("div");
        tile.className = "tile";
        tile.style.background = PALETTE[i % PALETTE.length];
        grid.appendChild(tile);
        tiles.push(tile);
      }

      // Scatter each tile from a deterministic offset/rotation, then pack into place.
      // Land order ripples diagonally (col + row) for a deterministic "assembling" feel.
      const STEP = 0.07;
      for (let i = 0; i < COUNT; i++) {
        const col = i % COLS;
        const row = Math.floor(i / COLS);
        const dx = (((i * 53) % 200) - 100) * 9; // far-flung scatter X
        const dy = (((i * 89) % 200) - 100) * 7; // far-flung scatter Y
        const rot = ((i * 37) % 80) - 40; // deterministic tilt
        const order = col + row; // diagonal land sequence
        tl.fromTo(
          tiles[i],
          { x: dx, y: dy, rotation: rot, scale: 0.6, autoAlpha: 0.15 },
          {
            x: 0,
            y: 0,
            rotation: 0,
            scale: 1,
            autoAlpha: 1,
            duration: 0.6,
            ease: "back.out(1.6)",
          },
          0.1 + order * STEP,
        );
      }

      // Settle the packed poster with a tiny breath so the loop seats cleanly.
      tl.to("#grid", { scale: 1.02, duration: 0.18, ease: "power2.out" }, 1.9);
      tl.to("#grid", { scale: 1, duration: 0.32, ease: "power2.inOut" }, 2.08);

      window.__timelines["mosaic-pack"] = tl;
    </script>
  </div>
</template>