This is a conditioning and defensive help drill.
Players 1 & 3 are defense, 2 & 4 are offense.
Player 1 has the ball to start and passes to 2.
On the pass from 1 to 2, 1, 3 & 4 start breaking down the court.
Player 1 will ultimately run to the free throw line at the other end and set up for defense.
Player 2 passes to #3 at about the free throw line elbow.
Player 2 breaks after his pass and sprints to the baseline then flares out to the wing.
Player 4 keeps breaking towards the mid-court line (in his lane).
Player 3 passes to #4 at about mid-court.
Player 3 sprints for the baseline under the basket.
Player 4 starts dribbling up...as if in a live game.
Player 2 has flared out to the wing.
Player 3 will hit the baseline and recover to guard #2.
Player 1 will begin to pressure #4.
This becomes a 2-on-2 drill IF the defense (# 3) has hustled down and #2 has contained the ball properly. If not, it becomes a 2-on-1 until #3 can recover.
Drill ends when offense scores or defense gains control of the ball.
If defense gains control, then the last offensive player must sprint back to play defense in a 2-on-1 break back the other way.