Setup
1 ball
4 players (2 offense, 2 defense)

X1 passes to X2 and sprints to defend O1.

X2 passes to O1 and sprints to defend O2.

O1 passes to O2.

X2 closes out on O2.

Now we play two on two.

Rotation
After the two on two, X1 goes on X2; X2 on O1; O1 on O2 and O2 on X1.