1. Each player is equipped with a bullet ring.

2. Delineate a rectangular area, with the starting wall as one side, and the player uses the elastic ring to throw the ball to the selected catcher, and the other side.

3. At the beginning of the game, the first player throws an elastic ring at the second player. The second player doesn't need any action, just wait for the elastic ring to land, then catch it with his own elastic ring, then throw it at the third player, and so on.

Players must pitch and catch the ball in order, and can't surpass the previous players.

5. If the elastic ring fails to fall into the hands of the catcher, it is necessary to throw the ball again.

6. After the game, the player who finally catches the elastic ring is the winner.

You can adjust the rules of the game according to the actual situation.