简单的多线程演示程序，一共有三个线程，主线程，左边是一个时钟，右边是一个小太阳，分别由一个线程来控制，参数由主程序传递，主线程控制整个程序-simple multithreading Demonstration Program, a total of three threads, the main thread, the left is a clock, the right side is a little sun, from one thread to control and transmis