yes i found it although last video uploaded before 8 months isn't that so much
A pyramid randomizer.... Its in the top left corner of the save.
how random is sprk produced by bpcln- whenever I have used it in piston powered moving objects it seems to produce sprk at random but short intervals. I wondered if I could minuturise my randomisers by using it and switches instead. BTW I also use 4 tier pyramid at the moment.