Tofte Simulators

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Shapes and chance

Klein Bottle Heat

How it works, and what it shows: read the note on the blog.

Try next

Walk a Circle Walk the same distance in every direction and measure the loop you made.
Flood a Landscape Flood a random landscape and find the moment the puddles join up.
Order and Chaos A waterwheel that reverses at random, forever. Five metronomes that fall into step by themselves. Fifteen pendulums that scatter and line up again every 60 seconds. A jar where the biggest ball rises to the top.

Every simulator runs on our own engine and shows its working. The notes on the blog explain how they work.