Spiral Battle

Three colors hunt each other into swirling vortices.

Pixel Scenes · a single painted seed plus one Phlux rule, simulated live · 96×96 grid

The rule that makes it move

This is the whole thing. Phluxel runs it on every cell, every step — the animation is what happens when you repeat it.

PARAM _beat = 700; LET _sr = +(-1:1,-1:1).R; LET _sg = +(-1:1,-1:1).G; LET _sb = +(-1:1,-1:1).B; R >= G & R >= B ? (_sg > _beat ? [255,0,255,0] : [255,255,0,0]) : (G >= B ? (_sb > _beat ? [255,0,0,255] : [255,0,255,0]) : (_sr > _beat ? [255,255,0,0] : [255,0,0,255]))

Paste it into the Rule Editor, or pick Rock-Paper-Scissors from the template list and skip the typing.

Make it yourself

1. Open Phluxel and start a new field, or click Spiral Battle in the starter gallery to get this exact setup.
2. Turn Wrap edges on — this one is toroidal, so motion that leaves one side comes back on the other.
3. Press play. Change colours or numbers while it runs; you never have to stop and restart.
4. Export a seamless loop as GIF, APNG, MP4, a PNG sequence, or a sprite sheet.