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04 / Playground
A little corner to play with code. Everything here runs in your browser, no tracking, just curiosity.
Type help to start. It also opens on any page with ` or Ctrl/⌘ + K.
John Conway’s cellular automaton: four simple rules, endless behavior. Click or drag to draw cells.
1A live cell with fewer than 2 neighbors dies (loneliness).
2With 2 or 3 neighbors, it survives.
3With more than 3, it dies (overpopulation).
4A dead cell with exactly 3 neighbors is born.
Every sound on this site is synthesized in real time in your browser, 8-bit style, with no audio files at all. Every moment of the journey has its own.
A tribute to the 2000s web: classic fonts, loud colors, a scrolling marquee and a visitor counter. The way Mario Brasil was born.
There are secrets scattered around the site. Some players know an ancient code; others prefer digging through the terminal (try ls and cat).
Unlocked by exploring the site. Saved only in your browser.