Algodoo

This is really cool, and I figured out how to make it even cooler with dynamic COLOR! Here's how if interested: Select all 512 polygons, then in colorHSVA replace the value that's shown with this script (make sure to include the squigly brackets):

{
[(pos(0) + pos(1)) * sim.time * 8, 1.0, 1.0, 1]
}

Also, the colors will show up better if you darken the background.

Then edit the scene on Algobox with your edited scene.