说明：   可爱小动画 本动画先显示一些提示信息，然后按任意键进入，只见一个方框向中 间由大变小，并留下痕迹，然后出现一个心，按空格重复出现心，按其他 键将重复,按Q键退出程序，。
(Cute small animation of the animation to show some message, and then press any key to enter, I saw a box to the middle by the small change, leaving traces, and then a heart, according to space recurring heart, according to other key duplication, according to Q key exit procedures.)