在屏幕中连续地以六个点绘出五条直线, 能够观察到绘制的过程，即从第一点开始依次到下一点绘制直线的过程动态地显示出来-On the screen in six consecutive points to draw five straight lines, able to observe the process of mapping, that is, from the beginning of the first point followed by drawing a straight line to the next point the process of dynamically displayed