Now that I had Blink running and could program the ATTINY84 at will, developing the text display routine was easy. The first program is included as  T84_POV1.ino. The algorithm is obvious, and the timing used is shown. See the picture. I'll add a video soon. Since this was my first POV device, I mistakenly thought I was nearly done. Next up was to try to put the accelerometer back on the board and use it for wake up.