The Fibonacci Bounce
Clean output triggers the parade. All the cats march left to right โ every single time code runs without errors.
Try it โEach snippet triggers something specific. Click "Try it โ" and watch what happens when you run it in the editor.
Clean output triggers the parade. All the cats march left to right โ every single time code runs without errors.
Try it โYour first run in a fresh session triggers the milestone cat โ confetti, a tiny hat, full celebration mode.
Try it โA runtime error makes the hisser arch its back. Fix the bug and the cat immediately settles โ it's watching you.
Try it โThree or more TODO comments summons the nap cat. It curls up on your unfinished work and breathes softly. Not helpful. Very cozy.
Try it โLog :cat to the console and a hand-drawn ASCII cat appears in amber. Seven designs, randomly selected. Try a few.
The milestone cat remembers every run across sessions. Hit 1, 10, 25, or 50 runs and it throws a full party. It has a hat. Earned.
Try it โCode that runs clean but produces no output still triggers the parade โ the cats celebrate correctness, not noise.
Try it โA minimal Python script that prints the colony roster. Runs clean, triggers the parade, and makes a surprisingly good wallpaper.
Try it โWant to build your own? The editor is free, no sign-up required.
Open the editor โ