How do I make the enemy change animation after it hits the wall and bounces off?

First time it bounces off the wall is okey, but the rest is not happening. The value of Dir only changes once.

Looks like you have two Dir variables - one global/local and one instance. Make sure to use the instance variable on the Frog sprite.

Thanks, it almost works flawlessly.

The problem now is that at the 3rd collision it won't change animation/mirror the frog.

Frog has the following behaviors: Bullet, Bound To Layout and Follow.

The Wall has Solid.

Changed the Even sheet of the Frog:

+ Frog: On collision with Wall

-> Frog: Bounce Bullet off Wall

-> Frog: Set DirFrog to 1 - Frog.DirFrog

----+ System: Frog.DirFrog = 0

-----> Frog: Set animation to "WalkRight" (play from beginning)

-----> Frog: Set Mirrored

----+ System: Else

-----> Frog: Set animation to "WalkLeft" (play from beginning)

Since you have WalkLeft and WalkRight animations, why do you need to mirror the sprite?