Yin-Yang Ping-Pong
Description
Yin-Yang Ping-Pong is a simple entertainment widget, similar to a screen saver.
White and black balls bounce around a black-and-white playfield. When a ball bounces against the dividing line, that tile will change color, gradually changing the balance between the halves.
The balls can't be controlled directly, but the number and speed of balls can be modified. The playfield can be made larger or smaller by resizing the window.