How do I count bounces off walls

So I'm making a game, in which it is required to get a ball to a certain location while trying to get there with as little as possible bounces. To do that I presumably need to measure all the times the ball bounces off the wall. (bouncing occurs through the bullet behaviour).

The problem is that I don't have a clue how I could possibly do that.. any help maybe? If anythings unclear, just ask and I'll try to explain better

Have you tried using a ball event with "On-Collision" or "Is Overlapping sprite" condition with action to add 1 to a global variable?

Use "Trigger Once" condition as well so it only adds 1 until the next detected collision/overlap.

Otherwise without a .capx is hard to see exactly what you need.

omg I was thinking way too difficult, but thank you so much!