实现TWINS乒乓的对角线运动。

可以看到一对TWINS乒乓球的对角运动轨迹。在液晶显示屏两半显示面中对称的两个乒乓球从角落发出，向对角运动，到对角的角落然后又从头开始，如此循环。

可以按键盘的4键退出到主界面，进行选择进入其它组员模块。-achieve the diagonal movement. Can see a table tennis TWINS the right angle trajectory. The LCD screen shows two semi-symmetrical surface of the table tennis from two corners issued, the right angle to the campaign, right angle to the corner and then start from scratch, so the cycle. According to the four key keyboard to withdraw from the main interface, chose to enter other members module.