wiring a light fixture with a two hots and two neutrals
Connect all the (colored) hot wires together. Connect all the (white) neutral wires together.
The white neutral wire out of a light fixture must be connected to neutral. The black hot wire out of a light fixture must be connected to hot and a white wire (such as coming from a switch) may not be used for this connection.
Stop wasting time re-adjusting the pattern. Have several lawn sprinklers, one for each pattern.