Tactic:
      -follow the direction of the pass
      -watch the ball handler's chest

Skill:
      -ready position
      -quick movements from corner to corner
 

      -four players to a game
      -three passers in each corner of the grid
      -one active defender in the middle of the grid
      -rotate defender regularly
      -passers hold ball until teammates are ready for a 
        pass (don't pass the ball right away) this allows
        defender to get to the ball and in the ready 
        position