I followed Ben's guide to make a little ATTiny 2 colour VGA output of a clock counting down. https://github.com/duncanspumpkin/ATTiny-B-W-VGA

It was quite a challenge building it into such a tiny controller. Was doing it for a University project where we wanted to have the clock started from an external source so needed to keep one I/O free for that input. It ended up with every I/O pin of the 8 pin micro having a use.