If you've ever wanted to spray paint something with your phone as a contro.... Well here's your chance. A new device has been made that you can hook up to your phone, allowing it to control the paint. So you take this pice, and put it over the nozzle of the spray paint, select the picture, and go to town.

http://gizmodo.com/computer-controlled-spray-paint-lets-you-print-graffiti-1740003049