It's time to test your ability to react and observe. Test it out at Pong The Ball. There are static and dynamic balls. The ball in the middle is always in motion, and the color of the ball will change at any time. Change the position of the static ball and let the balls of the same color touch each other to score points. Try to avoid balls of different colors coming together, otherwise, it will fail. The ball will change color during exercise, so this requires your careful observation and timely reaction ability. How many points can you score? Good luck and have fun!