This circuit is a simple “lighthouse” style beacon that when powered on rotates light around 12 LEDs that are mounted on the circular PCB. The project uses a PIC12f683 using SourceBoost Technologies BoostC and OSRAM SIDELEDs as the lights. The link below explains how to build this as well as some of the problems its author came across although there’s a nice photo of the finished PCB design for those interested in using it.

Mini lighthouse LED circuit, via Electronics Lab