the attacker must keep moving in the box, while a defender is following.
The other player is standing outside the box.
The attacker starts with the ball in his/her hands and throws it to someone on the side and the person on the side throws it back to the attacker and then throws it back to someone else standing on the side.
The defender tries to take the ball.
When the defender takes the ball, he throws it back you will try again
The attacker always tries to run free and the defender tries to intercept the ball