要求学生在六个数码管滚动显示自己的学号（六位），每隔一定时间循环移位一次，学号为奇数则左移，学号为偶数则右移。间隔时间可由开关选择1秒，2秒，3秒和4秒。-Requires students in six digital scroll to show their student number (six), rotate once every certain period of time, the student number is odd, then left, then right student number is even. Interval can switch to select one second, two seconds, three seconds and four seconds.