The wing runs across with the ball (cover it from the defense wing) and pulls him along.
The backcourt crosses behind without ball and will be free with a pass backwards from the wing.
The ball is passed to the other wing who can pass CB, where it is returned.
The wing cross must be practiced from both sides.
CB is in the cross combination positioned as left backcourt, and the wing becomes a new CB.
If this rhythm is used all the players will play all positions.