Diagram A. O3 back-screens for O5 who tries to get inside position for the pass on the opposite low block. O4 fakes in, then cuts toward the corner and gets the in-bounds pass. O1 cuts out to the top ballside area.
Diagram B. O4 passes to O1, and then down-screens for O2. O2 cuts hard around the screen to the ballside corner, gets the pass from O1, and can shoot the corner 3-point shot (Diagram C). If the outside defender slides out on O2, O2 could pass to O4 posting up. O5 is in good position for the back-side rebound.
To run "Box-2" against the 2-3 zone, O4 down-screens the outside low zone defender.
See the diagrams below. O5 back-screens for O4. The in-bounds pass goes into the ball-side corner to O2 (and at this point looks a little like "Box-2" above). O4 cuts around O5's screen for the possible pass and lay-up. If the defense switches the screen and the X5 defender goes with O4, O4 clears out to the opposite block. Then O5, after sealing the screened defender, rolls to the ball-side block for the pass and lay-up.
Other options include a three-point shot from O2, or from O1 on the wing.
This play uses the familiar "box" formation, but moves the ball-side post player wide. This gives us a better angle for the screen. See Diagram A. O5 screens for O2. O2 cuts to the three-point arc for the pass and the open three-point shot. This is often open because the X5 defender is often reluctant to move outside.
Diagram B. If the defense switches the screen and the X5 moves outside on O2, then O5 seals and has inside position on the smaller X2 defender. O5 cuts to the hoop for the pass and shot. If the X4 defender picks up O5, then O4 may be open.
On the weak-side, O1 back-screens for O4 who cuts to the block for the possible pass. O1 moves out on top after screening.
To run "Box-Wide" against the 2-3 zone, O5 screens to top outside defender in the zone.
Here's another baseline OB play starting from a "box" formation. See the diagrams below. We'll pass the ball outside, eventually to the point. O4 moves to the short corner. O5 initially "digs in" to see if he/she can get the quick inside pass. After passing out to O2, the inbounder O3 curls around O5 looking for the pass in the middle from O1, and the easy shot.