I had originally wanted to make myself a spinning picture lamp
. Though I realized that these lamps use the heat from incandescent lamps to cause them to spin. I wasn't really thrilled about the idea of using incandescent bulbs and I no longer had any of them around. I did however have a computer fan with LEDs.
The fan, unfortunately, spins much to quickly to be used for pictures. I tried using with patterns of strips and spirals and discovered that it created an interesting Moiré effect.
Hence the name, though I was also considering calling it the "Hypno Lamp".
The lamp consists of two cylinders the pattern on the outside cylinder is printed on a transparency sheet and the spinning cylinder on the inside is printed on regular white printer paper. Both of these can be switched up, so you can try out different patterns.