实现VGA视频效果，可以把屏幕分为中间一个正方形和其余颜色不同，并且在正方形中有字幕A，并且利用按键可以移动此A-Achieve VGA video effects, can be divided into the middle of the screen a different color square and the rest, and the subtitles in the square in A, and use the A button can be moved