Introduction - If you have any usage issues, please Google them yourself
GUI components specified by the user to generate a small number of balls, each ball will appear random positions and with random colors, random speeds and random direction, the initial direction of the ball along the uniform motion, when it comes to the window edge small ball will change the direction of movement of the force based on the principle (to simplify consideration, the force only a small change in the direction of movement of the ball, the ball is still in accordance with the initial velocity of uniform motion, and does not consider the collision between the ball). Mouse displayed in the interface of square blocks, players need to move the mouse back and forth to avoid the ball and movement around the screen, if the mouse or hit any ball around the window, then the game is over. Programs need to provide timing functions, and finally display the player can hold the number of seconds.