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Pick up items and a wall moves up after collecting

Hey! I am pretty new in Unreal Engine. Trying to learn some basics but i still need to figure out how blueprints work.

I’m trying to make a specific wall to open (move up) after you have collected all coins. But i don’t know how, neither do i know which has to connect with who. I know at least by using a branch it goes on ‘‘true’’ after collecting all coins, and it stays at ‘‘false’’ if you haven’t collected everything. But then, how do I make the wall to move? How do I make the wall understand after collecting every coin, it has to move?