1. //CSS代码
   body {
   transform-style: preserve-3d;
   }
   .circle {
   border-radius: 50%;
   height: 80px;width:80px; display: inline-block;position: relative;border-width: 10px;border-style: solid;
   }
   .circle1 {
   border-color: red;transform: rotateY(-1deg);
   }
   .circle2 {
   border-color: blue;transform: rotateY(-1deg);
   }
   .circle3 {
   border-color: green; transform: rotateY(-1deg);
   }
   .circle4 {
   top: -60px; left: 53px;
   transform: rotateY(1deg);
   }
   .circle5 { top: -60px; left: 53px;
   border-color: gold;
   transform: rotateY(1deg); }
2. //HTML代码