Delphi:Delphi编写一个小程序，实现图像在窗口内随机移动，碰壁自动返回，类似网页中的漂浮广告一样，自由飘荡，悠闲自在的样子。

-Delphi: Delphi to write a small program to achieve image random moves within the window, hitting the wall automatically return, similar pages floating ads, free-floating, leisurely look.