[00]The sky
an aurora is a few sine waves wearing colour
Curtains
5 ribbons · wavy vertical bands, blurred & screen-blended
Colour
green teal violet magenta
Motion
per-ribbon sine drape · independent drift · slow phase
Wind
pointer bends all curtains & lifts intensity
Sky
twinkling stars (dark) · dawn palette in light mode
Status
🟢 alight · contrast AA · reduced-motion holds one frame
[01]Six bands
the aurora vocabulary, isolated · scroll to reveal
01 · curtain
A draped ribbon
One wavy band with a top-weighted gradient, blurred soft. Stack five at different speeds and the sky never loops. The hero above is live.
02 · starfield
Quiet backdrop
Twinkle by sine.
03 · ground glow
Light from below
A radial bloom anchors the curtains to a horizon they rise from.
04 · additive
Light adds, never hides
Curtains composite with screen blending, so overlaps brighten instead of stacking opaquely.
05 · spectrum
Green → magenta
Four stops.
06 · atmosphere
The first sky in the set
002 was a hard machine and 006 a contained specimen; 008 opens the lid — depth made of air and light instead of edges.
[02]Wind speed
drag to raise the solar wind · low = still drape, high = a storm
intensity
35
Field note: no noise textures, no video — each curtain is a filled canvas path whose centre-line is a sine of its own height, blurred and screen-blended. Five of them at different speeds give an aurora that genuinely never repeats. The wind is just your pointer nudging every phase at once.