抖动图像代码，为了使图象看起来好象从左上角向右下角扫过， 以产生运动的感觉，必须要反复拷贝左上方的那些像素的灰度值，逐步把它们融合在一起，看起来好象图像后边有一些颜色在逐渐的消失-Shake the image code, in order to make the image look as if swept from top left to bottom right, to produce the feeling of movement must be repeated copies le