在窗口中显示出26个英文字母，从左向右字母依次位置提高10个像素单位，并且颜色变为红色，然后回到正常位置。当达到最右端后改变方向，从右向左逐渐变为红色，并且位置依次提高10个像素单位。

-In the window shows the 26 English letters, the letters from left to right, followed by location of units increased by 10 pixels, and the color turns red, then back to normal position. When you reach the extreme right after the change of direction, from right to left gradually turns red, and the location of pixels in turn increased by 10 units.