I want the spirte to be able to walk between 2 walls, but it cannot cross them. The spirte will look like he is walking between walls and the half of the image will be on top of one of the walls while walking. Using Moving object a way will not work what event action I should use?
You can use the action to separate objects 
Conditions: No conditions
Actions: Separate Sprite from Wall
What’s the perspective of your game? Is an isometric game, sidescroller, top-down, other? Why your sprite can’t walk between two walls? Don’t get it.