The Sub-Chieftains

It is known that Gearmaster Mechazod has four sub-chieftains that manage the robots in the pools.$B$BWe must put an end to them!$B$BOur longrunners and snow trackers say that if you were to turn the valves at the west point, north point, mid point and south point stations, each of his sub-chieftains would come quickly to prevent you from fouling their operations.$B$BThe stations are centered on the spinning lights in the pools surrounding the pumping station.$B$BHurry, $N!