<!DOCTYPE html>
 <html>
	  <head>
		  <meta charset="UTF-8">
		  <title></title>
		  <style type="text/css">
			  .a1{
				  width: 600px;
				  height: 600px;
				  border-radius: 600px;
				  background: black;
				  border: 1px black solid;
			  }
			  .a2{
				  width: 598px;
				  height: 299px;
				  border-radius: 598px 598px 0px 0px;
				  background: white;
				  border: 1px white solid;
			  }
			  .a3{
				  width: 298px;
				  height: 298px;
				  border-radius: 100%;
				  background: white;
				  margin: -150px 0px;
				  border: 1px white solid;
			  }
			  .a4{
				  width: 300px;
				  height: 300px;
				  border-radius: 100%;
				  background: black;
				  border: 1px black solid;
				  margin: 150px 298px;
			  }
			  .a5{
				  width: 60px;
				  height: 60px;
				  border-radius: 100%;
				  background: black;
				  margin: 120px auto;
			  }
			  .a6{
				  width: 60px;
				  height: 60px;
				  border-radius: 100%;
				  background: white;
				  margin: 120px auto;
			  }
			  </style>
	</head>
	<body>
		  <div class="a1">
			    <div class="a2">
				      <div class="a4">
					        <div class="a6"></div>
				      </div>
			    </div>
			    <div class="a3">
				      <div class="a5"></div>
			    </div>
		  </div>
		
	</body>
</html>
效果图:

太极图:
一个大圆为黑色里面加上一个白色的半圆,在黑色大圆里面设置一个白色的小圆,在白色的小圆里设置一个黑色的小圆,
右边同上面的一样
 
                     
                    
                 
                    
                 
         
