说明：  制作JAVA小动画，执行本例实例后，将在浏览器窗口内显示一个JAVA小动画。显示顺序是：先显示JAVA的咖啡形状的logo图片，然后依次显示 带有“J”,” A”,” V”, “A” 四个字母的图片。显示结束后，程序会自行循环。
(JAVA small animation production, the implementation of the cases example, the browser window displays a small Java animation. The order is revealed : the first showing Java coffee-shaped logo pictures, to be followed by shows with "J", "A" and "V", "A" four-letter images. After the show, procedures own circle.)