Cells shader preview: A living Voronoi network in fine dotted hairlines, with signals running along its edges.
ittybitty

Cells

A living Voronoi network in fine dotted hairlines, with signals running along its edges.

Code

Use as

Copy embed: paste into Webflow, Framer, Squarespace or any HTML · Copy for agent: paste into Cursor or Claude · Copy code: the files for your own build.

For your own build, add cells.js, ittybitty-shader.js, runtime.js and pointer.js next to this page. Highlighted values follow the controls.

<!-- Quickest: one element. Size it with CSS; it fills its box. -->
<script type="module" src="./ittybitty-shader.js"></script>
<ittybitty-shader effect="cells" style="width: 100%; aspect-ratio: 16 / 10;"></ittybitty-shader>

<!-- Or with JavaScript, for full control: -->
<canvas id="cells" aria-hidden="true" style="width: 100%; aspect-ratio: 16 / 10; display: block"></canvas>

<script type="module">
  import { cells } from './cells.js';

  const canvas = document.getElementById('cells');
  const effect = cells(canvas, {
    showBackground: true,
    showPulses: true,
    speed: 0.5,
    size: 1,
    jitter: 0.85,
    rounding: 0.75,
    width: 1.2,
    dots: 0.85,
    glow: 0.12,
    network: 0.55,
    division: 0.3,
    fill: 0,
    colors: [[0, '#79ed68'], [0.48, '#79ed68'], [0.52, '#c46ee0'], [1, '#c46ee0']],
    backdrop: 'solid',
    background: '#07080f',
    pulses: 0.15,
    pulseSpeed: 1,
    interactive: true,
    responsiveness: 0.5,
    // Performance
    dpr: 1.5,
    adaptive: true,
  });

  // Later: effect.set(…), effect.pause(), effect.resume(), effect.destroy()
</script>

Details

A Voronoi network drawn in fine dotted hairlines, each cell rounded where three meet, so every junction opens into a tiny curved triangle. The cells drift on slow orbits, now and then one pinches in two and later heals, and parts of the network fade in and out while sparks of light run along the edges like signals through nerves. Over a dark backdrop, the page itself, or an iridescent wash seen through the cells like frosted glass. The pointer magnifies the cells beneath it, and a click sends a ring of light out through the network.

Payload
12.2 KB brotli for cells.js, ittybitty-shader.js, runtime.js and pointer.js, measured at build time.
Resolution
Device pixel ratio capped at 1.5; lines are measured in CSS pixels, so hairlines stay hairlines. Seeds are placed on the CPU each frame into a small float texture, so each pixel only reads nine.
Frame rate
Display rate.
When unseen
Stops rendering when the canvas leaves the viewport or the tab is hidden, and resumes where it left off.
Reduced motion
Shows a single still frame. Controls and the pointer still update it.
Layers
Up to five effects fuse into one shader and one draw call. Filters such as dithering and halftone process the layers beneath them.
Browsers
Any browser with WebGL2: Chrome and Edge 56+, Firefox 51+, Safari 15+.
Licence
MIT. Copy it, change it, ship it.