After each pass the players move to the middle of the diamond. Before they are to receive the ball each player moves to the cone, opens up and receives the ball before passing to the next player. This allows you to coach the players to time their run and open their body when they show for the ball.
Use 5 players to start, one for each corner of the diamond and the other one in the middle. Players on outside need to make a turn before playing it in the middle, faking a pass to one of the diamonds sides.