Hi,I developed an open source java application that shows a
laser light source moving within a lattice of circular shaped
mirrors in order to find positions where the reflection patterns
become symmetric. The animation starts with a 2x2 lattice and
ends with a 30x30 lattice.
http://frozenlight.berlios.de/
The link "Launch Screensaver" starts the animation in full
screen mode. Alternatively it is possible to launch the
application with the link "Launch FroZenLight" and enable
the animation through the menu.