A cross between a Kaleidoscope and an Infinity Mirror! As you change the rotation of the mirror, the lights change in response. This project is built with an off-the-shelf mirror and picture frame, and a few other components. The Arduino 101 development board has a built-in positional sensing that we can use to sense the angle, and control the light display.
Each Monday is ArduinoMonday here at Adafruit! Be sure to check out our posts, tutorials and new Arduino related products. Adafruit manufactures the Arduino right here in the United States in cooperation with arduino.cc. We have a huge selection of Arduino accessories and all the code and tutorials to get you up and running in no time!