编写程序，在某一个窗口上设计一行文字，如“欲穷千里目，更上一层楼”，这一行文字从窗口的左边向右滚动显示，而且每显示一轮，改变一次颜色，改变一次字体，一个周期为4种颜色，分别为红、绿、黄、蓝，四种字体分别为宋体、楷体、仿宋和黑体。-programming, in a window on a design his words, such as "For Dedication goes," the lines from the left side of the window to