How do I make events "not loop"?

(Sorry bad english)

I am making a space ship game, and I want to the enemies drop power-ups. But I can't figure out a way to do that that doesn't loop all the time. I don't know if I am explaining this the correct way, so here's an image of my events.

Somebody help me please

Translation:

inimigo = enemy

bala = bullet (space ship projectile)

explosão = explosion (effect)

You mean you need 1-in-5 chance to drop a power up?

random(0,5) will generate a random number between 0 and 4.99999999999, it will never be exactly 5. Change your condition to random(5)<1, this will give you a 1-in-5 chance.

Another option: choose(1,2,3,4,5)=5

Thanks for the tip, but I want to also know how to make the events not loop, like:

When I shoot an enemy, it will verify if the variable PowerUp is 5, and when I make that sub-event, it will keep creating PowerUps. Here's an image to clarify:

Another example is:

I want to make a music start when I am in a certain area, but when I make a:

"When Player is here, this music play"

The music keeps repeating

there is no loop in the screenshot you posted in your first comment. "On collision" event happens only once, and the enemy is destroyed. So the sub-event is never repeated.

With music you need to assign a tag to the audio and check that this tag is not already playing.

If player X>2000
Audio "music" is NOT playing
	Audio play Music with tag "music"

there is no loop in the screenshot you posted in your first comment. "On collision" event happens only once, and the enemy is destroyed. So the sub-event is never repeated.

With music you need to assign a tag to the audio and check that this tag is not already playing.

> If player X>2000
Audio "music" is NOT playing
	Audio play Music with tag "music"

Thanks very much