Conway's Game of Life

60 × 40 grid · finite boundaries (cells outside are dead) · B3 / S23 rules

Paused Generation: 0 Alive: 3

Speed 140 ms

While paused: click a cell to toggle it, or drag to paint — the first cell decides whether the stroke paints alive or dead.
A live cell survives with 2–3 neighbours; a dead cell is born with exactly 3.