Procedural wood: growth rings warped by noise into a plank-like grain, computed into a low-resolution image and upscaled so it stays soft. The grain drifts very slowly, and the pointer presses a knot into the wood that tightens the rings around it.
Run the real thing here, tune it, then copy the prompt that rebuilds it.
The preview is the shipped loop itself: CSS, SVG or Canvas 2D, a few kilobytes, no WebGL.
Swatches recolour, sliders change density and speed, toggles switch parts on and off. Randomize for a surprise.
A snippet for any page, or a component for Next.js, React, Vue, Astro, WordPress, Shopify or Webflow.
It quotes the loop verbatim with your CONFIG values baked in, plus the integration rules.
Container gets position: relative and overflow: hidden; the background fills it; content sits above.