说明：图像处理能实现利用按键控制一个红色方块在屏幕上显示，程序思路清晰明了，易学习。
Image processing can be achieved using the button control a red box appears on the screen, program ideas clear, easy to learn.
说明：图像处理能实现利用按键控制一个红色方块在屏幕上显示，程序思路清晰明了，易学习。
Image processing can be achieved using the button control a red box appears on the screen, program ideas clear, easy to learn.
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