a two-dimensional rule field: seeds become blinkers and gliders — and if nobody touches the garden and it stays quiet long enough, what remains is called a still life
conway's game of life, the rule set b3/s23: a dead cell is born with exactly three live neighbours; a live cell survives with two or three; everything else dies. click or drag to plant cells, shift-drag to pull them out, w toggles the wraparound edge, space pauses, + / − change speed, c clears, r sows a random field, s saves a png. on a phone, just drag — it plants from your finger.