![](http://4.bp.blogspot.com/_0f8OKx_w2A0/SlqCy3DIYlI/AAAAAAAABvw/Pl7MyAI5Je4/s400/0vadimkibardin.jpg)
"Designer Vadim Kibardin's Black & White Clock turns two dimensions into three with a series of four OLED digits, each with their own power source.
A light sensor would figure out if it's bright or dark in the room, adjusting the numbers accordingly--going dark to form numbers during the day, and bright white at night."