OK. sequence is as follows:1a,1b,1c,1d... 2a,2b,2c,2d... for each string so that the (a) led in each string will light up, then the (b) led in each string and so on.. ie:
1a---1b---1c---1d---2a---2b---2c---2d---3a---3b---3c---3d---
4a---4b---4c---4d---5a---5b---5c---5d---
6a---6b---6c---6d---7a---7b---7c---7d---
all (a) lights wired in series, all (b)lights wired in series and so on so that at any one time there are 7 led's on in a chasing pattern (according to the programed sequence)
4 sets of 7 - 3v 20ma leds so that each led in the set lights in sequence. They will be powered by 8-aa batteries providing 12 volts (more batteries can be added if needed)