This is my first real DIY project using the Arduino. Not spectacular, it triggers LEDs in a 8x8 matrix. That has been done before. E. g. it is described in the Arduino Cookbook 2nd edition. Anyhow, I'd have been happy to see a little code example beforehand. That would have saved me some time.
This program is licensed under the BSD license. Use it, extend it, share it. (C) Frank Becker, 2012