forever components

Primary Grid Compositions

Victory Boogie Marquee

A 9x9 neoplastic grid rotated 45° as a diamond; red, blue, and yellow squares ripple diagonally in a boogie-woogie march via time-stepped index.

canvasmedium complexitymoderate motion

Open on the canvas to copy the code → Free account · 3 copies a day · membership goes unlimited

Live demo — the real component, running in a sandbox. One self-contained HTML file, zero dependencies. Open it on the canvas →
Worth keeping? Votes steer what gets built next — sign in to cast one, free to read

When to use it

Art-themed hero backgrounds, neoplastic/De Stijl creative projects, ambient looping displays needing bold primary color motion.

When not to

Contexts needing legible text overlays or minimalist UIs — the rotating diamond and marching colors dominate the viewport.

Working with an AI agent

Every component ships agent-ready metadata. An example instruction for this one:

Change N from 9 to 12 for a finer grid, slow the march by setting the dt multiplier from 0.0025 to 0.001, and swap C.white background for C.yellow. Theme: dark tokens live in :root, the light variant in :root[data-theme="light"]; ?theme=light or a {type:'forever:theme'} postMessage switches at runtime.

Safe to edit

  • grid size (N=9)
  • march speed (dt * 0.0025)
  • color palette (PAL array)
  • diamond scale factor (R * Math.SQRT2 * 0.9)
  • line thickness (TH=5)
  • theme tokens (:root dark defaults + [data-theme=light] overrides)

Keep intact

  • IIFE wrapper
  • prefers-reduced-motion guard (REDUCED)
  • visibilitychange pause/resume
  • DPR-aware fitCanvas()
  • theme hook (?theme= bootstrap + forever:theme message listener + theme tokens)

Known limitations

  • Color distribution uses modular arithmetic — changing N alters colored-cell density unpredictably
  • No pointer interactivity; purely ambient

gridcanvasgenerativecolor-marchgeometricambient

More Primary Grid Compositions components

  • The Rebalancing Gridneoplastic grid of black lines slides to new layouts while red, blue, and yellow cells fade in, resolving into a balanced composition every few seconds.
  • Broadway Boogie WoogieColored squares pulse along yellow grid avenues like NYC traffic; intersection dots blink in red, blue, and yellow referencing neoplastic's 1943 painting.
  • Self-Assembling Compositionneoplastic grid builds itself every 4 s: cells scale in staggered, black lines draw outward, primary colors fill random regions, then recomposes anew.
  • Trading WeightRed and blue blocks trade mass across a fixed axis; a yellow counterweight keeps the neoplastic grid balanced. Slow eased transitions reseed randomly.
  • Self-Painting CellsA fixed asymmetric neoplastic grid whose cells autonomously cycle through red, blue, and yellow with smooth CSS transitions, like an unattended painter at…
  • Equilibrium Engineneoplastic grid with spring-driven lines; primary color blocks recolor every 2s; a center-of-mass dot tracks the weighted area of colored cells.