Shapes and chance

Flood a Landscape

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

Try next

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.
Optical Illusions Two squares that are the same grey. Level lines that slope. Two bars that take turns at one speed. A wheel that turns backwards, and a green disc that is never drawn.
Light and Rainbows Sunlight on a drop of water, followed ray by ray, paints a bow 40.6 to 42.3 degrees from the shadow of your head. Flatten the drop, make it glass, or send white light through a prism.