Need help in one thing in action shooter game

I make simple game about shooting to aliens.

Your base is covered by walls but aliens can break walls. When wall is broken engineer repair each broken wall but when he finish repair all walls he walk away because i dont know which events use to set him back at the military base

Personally I would put his target position in variables (I like putting things in variables, what can I do )

Then I would execute his movement like I did in the picture, line 35-39. You can put said variables inside engineer, If you want to separate them from the rest.

Also some additional conditions will be needed if you want him some advanced features, like "go to the nearest damaged wall" or something like that.

razorMonkey looks good