instead of unpausing and pausing very qoukly, press f and it will display the next frame.
just a tip... spark a few places on the pscn (while puased) then delete 3 pixels from behind the spark (do this the same with all sparks in the same direction) then unpause and pause very quickly and put back the PSCN. if done right it means that u can create endless electricity. (people use this all the time) and all the sparks will travel in the same direction. it may work and it may not but just give it a go.
kudos to you man this is epic only einstien could make this but i guess your better.