But see how you ALSO could patrol :
Trigger 001 mover
Event : A unit enters <Region1>
Conditions : Triggering unit is equal to YourUnit
Actions : Trigger : Turn on (This trigger)
Order (Triggering unit) to (attack) to <Region2>
And then back again :
Event : A unit enters <Region2>
Conditions : Triggering unit is equal to YourUnit
Actions : Trigger - Turn on (this trigger)
Order (Triggering unit) to (attack) to <Region1>
That should work