Platform Game: Enemy turn around on Edge

How do I make enemies turn around on platform edges?

I tried with invisible object and mirror on collision, but enemy doesnt go back, just mirror.

SOLVED: Make 2 invisible objects Mirror1 and Mirror2

On Collision with Mirror1 set Bounce off and set Mirrored, on collision with Mirror 2 set Bounce off and set notMirrored.

Making 2 mirrors on both sides of platform were easiest way to do it.

Lets say your sprite marking the end of the platform is called "end"

Player on collision with sprite(end) -> set mirrored

I found easiest and best working way, check first post.