Something new:

I leaned something new the other day and decided to give it a go. Charlieplexing is a type of multiplexing for LEDs that allows N pins to control N*(N-1) LEDs. So 5 pins on a Tiny13 can control 20Leds. I used 14 and here is the result:

Update: I tried POV (persistence of vision) but I'm not really clear on what needs to happen for the affect to show up. It was a half-hearted attempt to say the least.

Jay