[pe lang] shares a system to spill water drops over a surface: many different uses from medical to artistic purposes.

achine that adds drops of water onto a special textured surface. Each drop forms into an almost perfect sphere through the surface tension of the water and the omniphopic Material. The electronically controlled pipette wanders through a square grid of 21 x 21 drops to form a micro-matrix and returns to the beginning. After approximately 300 minutes, and when thewater drops have evaporated, the same process starts again.

Via  [Gizmodo], source [Arduino Forum]