I would like to make a parabomb ability. When a spell is cast, a plane moves from casting unit to target point of ability being cast. How can I make the plane to move to the selected direction until it reachers the border of the playable map area? I'm going to make the plane drop the bombs when he is is in 200, 100, 0, 100 and 200 range of target point. How can I create dummy units to those points. Thanks in advance.