In a short, but sweet animation, artist and musician Ryan Cashman animated a sprightly green character playing the piano on a rooftop in San Diego. Cashman animated the film using light painting, which is the technique of photographing at extremely long exposure times so that light is captured as it is moving in front of the lens. Cashman painted each individual position separately at 20-30 second exposure time with only a green-glowing LED Keychain which he then synchronized in After Effects to a musical composition that he wrote himself.

Take a look at the result:

Light-Paint Piano Player from Ryan Cashman on Vimeo.