4 and 5 screen the bottom part of the zone. 3 is the best scorer, he cuts down the lane and uses 4 or 5. If he uses 4, 1 passes to 2 who looks to hit 3. 4 opens to the ball on the pass to 3.
2
If there is no shot or post feed to 4, the ball is reversed back to the other side, 3 runs the baseline using 4 and 5.