Thanks, it took some time but now I understand how it works.

I also made another version of memorizer which saves latest first value after 0, e.g. if "n" is a value at certain tick, then when condition "n != 0 and n-1 = 0" is met then "n" is saved.

0eNrNVW1uozAQvcv8XDlV ...

I built a thing around memory cell I called memorizer. Maybe there was something similar before me, but couldn't find. The idea is when a certain signal disappears (became 0) it value persists in a memory cell. When it appears again it resets ...