Condition inside of a Loop

so quick question, it it possible to add condition inside of loop so they run every loop iteration? for example if i had

repeat(20) => Set Variable X = loopindex * random(0, 5)

and then added a sub event

System compare Variable X > 0 => create object "anything"

since the create is in a sub event will that check happen every loop iteration or will it happen once after the loop has ended?

and then how can i make the check happen every loop iteration?

After some testing with logging,i found my answer, yes the loop repeats everything in the sub event, but what ever is picked in the room also gets picked in the sub event