This is an ingenious idea. It could be fun with an image put in the mix too along with the solid colors. You can change the wall to fit your mood, the time of day, or spell out a message. Found [Via]

Change It! Wall Concept

Amirkhan Abdurakhmanov’s Change It! wall concept; allows you to configure walls in any color/design of your choice. The wall is constructed with three sided colored pixels that can be rotated between black, white, or a more colorful side.