Lines 1/3 Start at same time
Lines 2/4 Start at same time

At same time:
Player 1 passes to Line 2
Player 3 passes to Line 4

Line 2 passes to Player 3
Line 4 passes to Player 1

Progression
Player 1 passes to Line 4 and (one touch) return pass
Player 3 passes to Line 2 and (one touch) return pass

Line 1/3 go in and shoot!