太极图
会动哦！
html：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="./太极.css">
</head>
<body>
<div class="box">
<div class="left"></div>
<div class="right"></div>
</div>
</body>
</html>
真的是纯css，html就4行。。。
css：
.box {
height: 400px;
width: 400px;
border: 1px solid #000;
border-radius: 50%;
display: flex; /*flex布局*/
align-items: center;
position: absolute;
margin: auto;
top: 0;
bottom: 0;
left: 0;
right: 0;
background: linear-gradient(black 50%, white 50%);/*上黑下白*/
transition: all 2s ease;
}
.right,
.left {
height: 50px;
width: 50px;
border-radius: 50%;/*圆形*/
}
.left {
border: 75px solid #ffffff; /*白小半圆中间黑*/
background-color: #000;
}
.right {
border: 75px solid #000;/*黑小半圆中间白*/
background-color: #ffffff;
}
.box:hover {
transform: rotate(360deg);/*旋转360度*/
}
