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Conway's Game of Life running in a canvas, wrapping at the edges. Click or drag to draw — it pauses while you do.

An elementary (1D) cellular automaton explorer — pick a rule, pick a seed, watch it unfold.

Four kinds of procedural noise, from pure static to layered Perlin — same underlying hash function, different amounts of structure.

A scene made of nothing but distance functions, rendered by marching rays through them one step at a time — no meshes, no triangles, no three.js.

Flocking from three local rules — switch each one off and watch an order parameter report exactly what it was doing.

The Gray-Scott model: two virtual chemicals react and diffuse across a grid, producing self-organizing spots, stripes, and coral from a few lines of math.

A 16-step sequencer with synthesized drum sounds — no samples, just oscillators and filtered noise through the Web Audio API.

Bjorklund's algorithm distributes N hits as evenly as possible across M steps — a natural sibling to the drum machine, generated rather than hand-programmed.

Plucked-string synthesis from a noise burst circling a short delay line — no samples, the waveform itself is the algorithm.

Build a tone by drawing its harmonics one bar at a time — Fourier's theorem as an instrument, ripple and all.

A live spectrum analyser fed by the same voices the drum machine and Karplus-Strong pages use — synthesis seen from the other side.

A small regex engine that compiles patterns to an NFA via Thompson's construction, and renders the graph live.

A simulator for a real Turing machine — an unbounded tape, a read/write head, and a handful of states — running four small preset programs.

An untyped lambda calculus interpreter — step through beta-reductions on a syntax tree, watching Church encodings and combinators unfold.

A recursive-descent parser with its stack and syntax tree exposed — the context-free rung between the regex engine and the Turing machine.

An n-gram Markov chain trained on this site's own prose — raise the order and watch it go from noise to fluent to plagiarism, with the copied runs highlighted.

The classic three-door probability puzzle — play it by hand, or simulate a few hundred rounds and watch switching pull ahead.

A 2×2 game solver next to a live phase portrait — edit the payoffs, see every equilibrium, and watch whether the dynamics actually reach one.

A polyalphabetic cipher, and the classical frequency-analysis attack that breaks it — watch the key get recovered letter by letter.

Build the code tree one merge at a time, watch frequent symbols collect short codes, and compare the result against the entropy it is chasing.

Real SHA-256, truncated short, colliding in seconds — a demonstration of why hash outputs are as long as they are.

A working Wehrmacht Enigma I, with the signal traced through every rotor — and the flaw in it that Turing turned into a machine.