Done for a college project, it's my multi-purpose clock! Using NeoPixels and the Adafruit NeoPixel library. The initial clock position code was found on the Learning system (I had no clue the useful function "map()" existed, awesome!).
The clock also displays animations, dances to music, can be dimmed, and is controlled via remote control. Built in animations such as fire, rainbow, or "guess the clock position" game, which randomly lights an LED after a glittering effect. You can see brief animations and concept videos of it on my YouTube Channel. :) https://www.youtube.com/user/SeiRruf/videos