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This Raspberry Pi project creates zen-like patterns using kinetic sand
Look at it go.
Have you seen those videos of those devices where a little marble draws patterns in sand, driven by a magnet? I've never owned one of those, but I can imagine myself staring at it for hours on end. There's just something mesmerising about a small marble making visually pleasing patterns in the sand, as if it was a small insect performing some mysterious ritual.
