Player A passes to the central player B as soon as player B makes an initiating movement. Player A then takes B's central position.
Player B passes the ball directly outward to C and moves to C's position. C now plays directly back to the center, where the ball is passed directly on to D, and so on.
Variation: A passes to B, who lets the ball bounce back directly and moves to position C. A then passes the ball to C and moves to the center. C passes to A, who lets it bounce back again and moves to position D, where C plays the ball, and so on.