A small place with two rooms. One has interactive toys you can play with; the other is a reading room for essays. Both share the same letterpress aesthetic — paper, ink, serifs, the feeling of a little book you can click on. Pick a door.
the toys
interactive things to play with
enter ›the margin
essays in the quiet hours
enter ›Rhyme Radar
a phonetic explorer
Type any word. See its rhyme neighbors arranged in concentric rings — perfect, near, assonance, consonance. Click any rhyme to sail through word-space; the breadcrumb remembers where you’ve been. Press p to export your walk as a found poem.
open ›Gravity Sandbox
N-body simulation with trail decay
Place bodies by click-dragging to set velocity; scroll to resize. Velocity Verlet integration with softened gravity keeps orbits stable. Five presets: Sun–Earth–Moon, the Chenciner–Montgomery figure-8, Trojan asteroids, three-body chaos, and a random cloud. G slider, trail-length slider, optional collision merging.
open ›Markov Chain Visualizer
state graph, matrix, walk, stationary distribution
Three coupled views of a Markov chain: a directed state graph with probability-weighted arrows, an editable transition matrix heatmap (click any cell to change it; the row re-normalizes), and an animated sample walk. Stats rail shows stationary distribution via power iteration, mean recurrence times, and irreducibility / ergodicity flags. Seven pre-loaded examples from the textbook two-state switch to Snakes & Ladders.
open ›Bichromator: Concrete
Brysbaert concreteness in prose
Paste English prose; each word is colored by its position on the concrete–abstract continuum using Brysbaert et al.’s 37,058-word norms. Warm terracotta for rock and hand; cool cerulean for freedom and meaning. Histogram, mean marker, and corpus calibration against McCarthy, news, philosophy, and legal text.
open ›Sound of Primes
number-theoretic sequences as music
Twin primes, Goldbach pairs, the Sieve of Eratosthenes, Mersenne bells, Collatz trajectories — eight modes. Primes sing sine; composites buzz square; the sieve clicks and rings its way through a grid of numbers. Pentatonic C major, C3–A5.
open ›Library of Babel
a small infinite library you can wander
Every page has an address. Navigate by coordinate, search for any phrase (the library places it rather than finds it), visit curated galleries, bookmark pages to a corkboard. The librarian speaks from the margin, sparsely. Borges’ six axioms in the sidebar; citations to the canonical Basile version.
open ›Sound of Sorting
nine algorithms, made audible
Each comparison and write fires a soft sine pluck mapped to a pentatonic scale. Bubble sort: a slow ascending wash. Radix sort: sweeping mechanical waves. Pancake sort: theatrical stack-flips. Plus cocktail shaker, stooge, and four more. Watch the bars and listen.
open ›Focus Timer
a pomodoro that lives in the terminal
A small Rust + ratatui countdown that picks up open tasks from a vault and writes each finished session into the day's note. CLI only — no browser preview. Built as a deliberate swing back to terminal tools after a long stretch of canvas toys.
view source ›L-systems Clock
an hour is a shape; a minute, a depth
Eight Lindenmayer systems cycle through the day — plant, fern, bush, Koch, Sierpinski, dragon, wave, leaf. The hour picks the shape and rotates its seed angle; the minute drives iteration depth. Glance at the figure and you know what time it is, no digits required. Pure stdlib Python, runs in any terminal.
view source ›Prose Bichromator
two languages in every English sentence
Paste English prose, see each word painted by its etymological lineage — Germanic in burnt sienna, Latinate in lapis blue. Bureaucratic prose lights up cool; lyric prose stays warm. The register a writer chooses becomes visible at a glance.
open ›Measure Theory Sparring
a drill room for σ-algebras and integrals
Twenty-five hand-curated cards across measure theory's exam-frequent core — σ-algebras, MCT/DCT/Fatou, Lp, Radon–Nikodym, Fubini. Each one ends with the trick or trap that stops being obvious once you've thought about it for ten years. Self-paced spaced repetition; press space to flip, 1/2/3 to grade.
open ›