Yann, thank you for your answer. However, I that's not exactly what I wanted. Actually, I tried to simplify my question and it came out wrong.
Here is an exemple of what I'm trying to do.
I'm using for this exemple the laser system by R0J0hound.
All that I want is to stop the laser if it collides with "wall" OR "sprite2" (the F box).
With one event for every sprite, all that I got is that the laser don't stop at all, because it will only stop if the laser is colliding with all the objects at the same time.
sorry for english, not my first language. And thanks for your time.