Gravitic Screensaver 4.0

Years ago I was asked to develop a little animation for a wait screen for a software on Windows. They simply wanted to have a ball move in a box and bounce on the sides of the box.
Well, that was boring! So I started adding some force fields and interactions to the balls. To visualize a force field, typically one will use lines, arrows, or some sort of vector-like graphic. While testing my software, at some point I got interested in the intensity alone. Not the direction. To represent the scalar I used a circle which radius would be linked to the intensity of the force-field at that point. I liked the visual of it. Actually, I liked it so much that I turned my wait screen into a screensaver.