A life-like cellular automaton lives on a grid where every cell is either alive or dead. Each generation, every cell counts its 8 neighbors and applies a fixed rule written as B(irth)/S(urvival): a dead cell with a birth-count of live neighbors switches on, a live cell that does not see a survival-count of neighbors switches off. The grid wraps at its edges (a torus), so gliders and other patterns that drift off one side reappear on the other instead of dying at a wall.
Conway's original B3/S23 balances birth and death closely enough to produce stable blocks, blinking oscillators and gliders that crawl indefinitely. Changing the same two numbers gives a completely different personality: HighLife (B36/S23) adds a replicator that copies small patterns; Seeds (B2/S) has no survival rule at all, so every live cell dies next step and only fresh births keep the grid alive, producing chaotic, ever-expanding lace; Day & Night (B3678/S34678) is symmetric between live and dead cells, so solid fields and empty fields behave like mirror images of each other.
Click or drag on the grid to draw your own starting pattern, then watch which rule turns it into order, chaos, or something that spreads forever.