Generation 0. Select the grid to draw cells.
A pocket laboratory for possible worlds
Run two worlds.
Keep what surprises you.
Compare cellular rules side by side, change their sense of time, and save the exact conditions behind every strange discovery.
Open the lab
Bench A / comparative run
Twin world deck
Both boards start from the same seed. Change one rule, then watch where the worlds part.
Keyboard: Space run/pause · N step · R reset
Generation 0. Select the grid to draw cells.
Edges wrap around like a looped tape. The lab is bounded to 48 × 32 cells to keep browsers responsive.
Tape archive / this browser
Discovery notebook
Name the observation, then preserve every rule, cell, seed, clock, and season setting needed to replay it.
Field notes / 3 moves
How to make a useful comparison
- 01
Hold the start still
Use the same seed and density so the rule is the only first difference.
- 02
Change one dial
Switch a rule or season, run to a clear generation, and pause both worlds together.
- 03
Write the outcome
Save a named snapshot, add what you noticed, and export it for a classmate to replay.