Life

Conway from a random soup, with a density control.

patterns.life · v1 · renderer canvas

B3/S23 · 225×150 cells · 240 generations · 38% soup · long exposure

The original. Poised between growth and extinction, which is why it supports gliders, guns and, eventually, a universal computer. Drawn as a long exposure of all 240 generations: every cell keeps a decaying record of how often it has been alive, so still lifes burn in brightest, oscillators sit dimmer, and a glider leaves a comet trail behind it. The world is a torus — B3/S23 wraps at every edge — so nothing falls off.

[data-canvas-stage] { display: none; }

Drawn in the browser

This generator does not send you an image. The server sends a short description of one — the parameters below, plus a 32-byte key — and the drawing is done here, from the same byte stream the server would have used. That needs JavaScript, so with it switched off there is nothing to show.

The description itself is still public: /api/v1/g/patterns.life returns it, and the maths is in resources/js.

B3/S23 · 225×150 cells · 240 generations · 38% soup · long exposure

Controls · from schema()

Width

200 2048

Height

200 2048

Rule

Custom rule

B/S notation: the neighbour counts that cause a birth, then the counts a live cell survives. Only read when the preset is Custom.

Cell size

1 16

Pixels per cell. Small cells mean a large world and more room for structure to travel.

Soup density

0.02 0.98

The fraction of cells alive at generation zero. Conway is liveliest around a third; the edges of this slider are where a rule shows what it does when starved or flooded.

Generations

1 900

Draw

Colour

Palette size

2 12

Entropy source

Picking a source changes the story on the receipt, never the quality: anything below class A is mixed with the OS CSPRNG before it reaches you. This result actually came from Operating System CSPRNG.

seed token G68R75RCYXSBP7MDMBWCS4XFPG

Re-render keeps this token. Generate replaces it. That is the whole idea.

Burned into the corner before the file is written, so the image keeps its provenance wherever it ends up:

entropy in

16 bytes

stream used

4 bytes

rejections

duration

175 µs

palette

rule

B3/S23

cells

33,750

generations

240

cell updates

8,100,000

rule space

2^18 = 262,144

Seed receipt

Class A · Cryptographic degraded

Drawn from the kernel entropy pool on the server that rendered this page. (The source you picked was unreachable, so we fell back to the kernel.)

source: Operating System CSPRNG
observed: 2026-09-14T17:21:43+00:00
latency: 1507ms
mixed with: nothing — this source stands alone

This source publishes no per-draw proof URL.

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The token is the seed, so this link recomputes the result rather than looking it up. No database, and it works for as long as v1 does.

This page and /api/v1/g/patterns.life run the same code. There is no private endpoint.

Life

Result

Measurements

Seed receipt

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