∞ forever components

De Stijl Neoplastic

Split Plane

A square canvas splits along alternating seams; two halves slide apart and reflow into new De Stijl primary-color compositions every 4.4 s.

canvasmedium complexitymoderate motion

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Live demo — the real component, running in a sandbox. One self-contained HTML file, zero dependencies. Open it on the canvas →
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When to use it

Art/design portfolio heroes, generative art showcases, neoplastic-inspired branding backgrounds.

When not to

Contexts needing legible text overlays — shifting planes compete with copy. Avoid on light backgrounds without restyling the outer dark field.

Working with an AI agent

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

Change the cycle duration to 3 seconds by setting `cycle=3`, swap accent blue to '#6B21A8' in the BLUE variable, and duplicate YEL in COLS for more frequent 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

  • cycle duration (cycle=4.4)
  • seam position options (SEAMS array)
  • color palette (RED, BLUE, YEL, PAINT)
  • line width ratio (S*0.024)
  • gap size peak (0.045)
  • cross-cut options (CROSS array)
  • theme tokens (:root dark defaults + [data-theme=light] overrides)

Keep intact

  • IIFE wrapper
  • prefers-reduced-motion guard (reduce flag + static draw path)
  • visibilitychange pause/resume
  • DPR-aware canvas sizing
  • theme hook (?theme= bootstrap + forever:theme message listener + theme tokens)

Known limitations

  • Background #0e0e10 is hardcoded in both CSS and canvas draw — must change in two places
  • Composition is always square (min of W/H) — non-square viewports show letterboxing

de-stijlneoplasticgeometricsplitcanvasloopprimary-colors

More De Stijl Neoplastic components

  • Grid RecomposeBlack grid lines slide between asymmetric positions with cubic easing, repartitioning red, blue, yellow, and off-white rectangles in neoplastic style.
  • Boogie Pulse26 primary-color blocks travel and blink along a black asymmetric De Stijl grid over static color-field plaques, evoking neoplastic's Broadway Boogie-Woogie.
  • Block FillPrimary-color rectangles wipe and rise in staggered sequence to fill cells of an asymmetric black De Stijl grid on warm white; loops continuously.
  • Line WeaveHorizontal and vertical cream lines thread and interlace over primary-color blocks on a dark field, with bright nodes at crossing points during the weave…
  • Dynamic EquilibriumSix neoplastic-colored rectangles hang from a tilting beam; a spring-damper drives it toward equilibrium while a slow bias keeps it gently alive.
  • Counter CompositionA neoplastic grid of red, blue, and yellow cells divided by black bars rotates from 38° and settles to a gentle 15° resting angle with a slow living drift.