DVD Lights

See LARGE.

Here's my instant challenge. Get one of your DVD-Rs or CD-Rs or whatever. Balance it by one finger on your desk. Shine a desklamp or a torch or something upon the disk and turn it by degrees, shooting as you go and see what you get. I shot off about 20 frames doing the above and didn't get exactly the same rainbow twice. Give it a try. See what you get.