Life

A grid of cells, each alive or dead. A dead cell with exactly three live neighbours is born; a live one with two or three survives; everything else dies. That's all of it, and somehow it's enough.

Click or drag to draw. Pick a pattern to stamp it instead. The edges wrap. Try the rule B36/S23, or B2/S. space play · s step · r random · c clear

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Written in Dart, compiled to JavaScript, baked into this page. Older cells fade, so the parts still changing stay dark.