Or you can use 66 odd HC4017 decimal counters ( at about 20 US cents each ) with a 555 clock, Its going to be over a meter diameter circle anyway with 5mm LEDs, so spread the chips around !
Whoops ! no arduino, I take that back ....... 
Or you can use 66 odd HC4017 decimal counters ( at about 20 US cents each ) with a 555 clock, Its going to be over a meter diameter circle anyway with 5mm LEDs, so spread the chips around !
Whoops ! no arduino, I take that back .......