这是一个模拟波纹的程序，按下鼠标左键可以产生波纹，时间越长波的振幅越大；按下左键并移动鼠标，效果比较好。-This is a simulation program ripple, ripples can be generated by pressing the left mouse button, the longer the greater the long-wave amplitude press the button and move the mouse, the effect is b