Snowy Night

Snow drifts down over a moonlit winter scene.

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 _rate = 3; Y == 0 ? (RN < _rate ? [255, 255, 255, 255] : [BASE]) : (N.R > 245 & N.G > 245 & N.B > 245 ? [255, 255, 255, 255] : (R > 245 & G > 245 & B > 245 ? [BASE]))

Paste it into the Rule Editor, or pick Falling Snow (behind objects, BASE) from the template list and skip the typing.

Make it yourself

1. Open Phluxel and start a new field, or click Snowy Night in the starter gallery to get this exact setup.
2. Leave Wrap edges off — this one is meant to have real borders.
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.