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
An open graph-paper notebook and two cassette tapes surrounded by diverging fields of colored cellular dots
Field kit no. 01 · two tapes, one starting point

Bench A / comparative run

Twin world deck

Both boards start from the same seed. Change one rule, then watch where the worlds part.

GEN 00000

Keyboard: Space run/pause · N step · R reset

WORLD ALIFE-LIKE

Generation 0. Select the grid to draw cells.

ACTIVE 0SEED
WORLD BLIFE-LIKE

Generation 0. Select the grid to draw cells.

ACTIVE 0SEED
WORLD DIFFERENCE0%0%Identical starting fields
Starting tape

Reset applies the seed and density to both worlds.

Clock & season

Seasons are playful modifiers, not scientific climate models.

ILLUSTRATIVE MODEL

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.

No account. Files and snapshots stay on this device.

Field notes / 3 moves

How to make a useful comparison

  1. 01

    Hold the start still

    Use the same seed and density so the rule is the only first difference.

  2. 02

    Change one dial

    Switch a rule or season, run to a clear generation, and pause both worlds together.

  3. 03

    Write the outcome

    Save a named snapshot, add what you noticed, and export it for a classmate to replay.