Cones are used to mark a playing area and four zones in the corners of the field as shown.
Four more positions of the wall players are created on the sidelines of the area.
Goals are placed on the baselines as shown.
Two teams of 8 are identified with different colors. Two groups of four are separated within each team. One group is placed into the wall positions and one group plays in the area.
Groups change their positions and roles after every repetition.

Inside players can combine with the wall players without any restriction. Goalkeeper can also play anyone of the wall players.
The wall players are positioned to the defending corner and the attacking side of the middle zone. Wall players can act only in their own area.
When the ball is out, goalkeepers restart the game by playing the ball to their team-mates.
Teams have to try to build up possession in an 8v4 outnumbered situation and with the help of the goalkeeper. (9v4)
The ball must be circulated as quickly as possible. Clear shooting or finishing opportunities should be created.