rulebook

256 one-dimensional rules and every life-like B/S rule. Edit the rule, watch what it does.

row 0

rule

lookup table click a result to flip it

each cell looks at itself and its two neighbours (left, centre, right). The bit under that pattern is what it becomes next row.

first row

speed edges wrap around

all 256 one cell, 48 rows each — click to open

gen 0 0 alive

rule

B = neighbour counts that give birth. S = counts that survive. Type it or click below.

birth an empty cell with this many live neighbours turns on

survive a live cell with this many stays on

named rules

fill

soup density 25% speed

draw on the grid with the mouse or a finger. Dragging paints; starting on a live cell erases.

mouse does

pattern

pick a pattern, switch to stamp, click the grid. it lands centred on the cursor and wraps at the edges.

RLE the format Life pattern files use

copy grid writes the live cells here. paste someone else's RLE and use it as a stamp.

home / cornerlink in the address bar holds the current rule