[SOLVED] How can I make a procedure with and "if then if not" block that check every tick make the "then" only once?

I have a procedure and the event is check every tick of a loaded entity. It have a "If then if not" block. The "then" gives a potion effect but I want that the event only gives the potion effect just once. I need to have the "check every tick of a loaded entity" because if I dont have it the "if" dont work

Solution: In Then I put a "If then" block with a "no" and "have effect" block in the "if" and the "give potion effect" block in then.