<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>太極圖</title>
<style type="text/css">
.taiji{position: relative; width: 200px; height: 200px; border-radius: 50%; background-color: #fff;border:solid 1px #ccc; animation: spin 6s linear infinite;}
.tj_1{position: absolute; top: 0px; width: 50%; height: 100%;}
.tj_big1{left: 0px; border-radius:100% 0 0 100% /50% 0 0 50%; background: #000;}
.tj_big2{right: 0px; border-radius:0 100% 100% 0 / 0 50% 50% 0; background: #fff;}
.tj_2{position: absolute; width: 50%; height: 50%; left: 25%; border-radius: 50%;}
.tj_s1{bottom: 0px; background: #fff;}
.tj_s2{top: 0px; background: #000;}
.tj_ss{position: absolute; width: 25%; height: 25%; left: 37.5%;border-radius: 50%;}
.tj_w{top:37.5%;background: #000;}
.tj_b{top:37.5%;background: #fff;}
@keyframes spin {
0% {
transform:rotate(0deg);
}
100% {
transform:rotate(360deg);
}
}
</style>
</head>
<body>
<div class="taiji">
<div class="tj_1 tj_big1"></div>
<div class="tj_1 tj_big2"></div>
<div class="tj_2 tj_s1">
<div class="tj_ss tj_w"></div>
</div>
<div class="tj_2 tj_s2">
<div class="tj_ss tj_b"></div>
</div>
</div>
</body>
</html>
