编程思路：

先记录下图想的每个像素点的像素值，显示的时候先将屏幕显示原图，将循环显示n次，这里设n从256，255，…，2，1，0。每一次显示像素值的n/256倍，图像的像素点计算一遍后，显示一次，重复执行上述过程，直至屏幕上所有的像素点全变黑。

-Programming ideas: a record of the pixel values ​ ​ of each pixel want the following figure, when the first screen displays the original image, the display will cycle n times, where n from 256,255 to ..., 2,1,0. Every pixel value is displayed of N/256 times the pixels of the image again, time, repeat the above process until all the pixels on the screen all black.