For Cycle repeats infinite times

Hello everyone, I'm making a for cycle to fill randomly an array. The problem I get is that this cycle is repeated for infinite times, the problem persists also into a textbox I want to refresh with these values (it's called TestoSqe1 inside the project).

Can someone help me? Here you fin the project:

add a start of layout condition to the for event. Events are run top down every frame so the "for" would be run every frame.

Thanks for the help.