当运行本程序时，会看到一条在窗口中不停摆动的直线，编织成一副美丽的网状图形，图像随着直线摆动不停地变幻，直到程序停止。-When running this program, we will see a window kept swinging straight, braided into a beautiful mesh graphics, images with linear swing changes constantly, until the procedures to stop.