The players start at the shown places and only RB, VB and LB makes piston movements.
The ball moves as follows: CB - RB - RW - CB - CR - LB - LW - CB.
Then it starts all over again.

When RB has made her piston movement and passed the ball she returns to CB's place.
When CB has made her piston movement she returns to LB's place.
When LB has made her piston movement and passes she runs VERY FAST to RB's place to be ready to receive the ball from CB.

When the players are familiar with the passes and movement, Seven 4 can be practised.