Tai Chi map produced CSS3

Taiji diagram may be understood as a semicircular half black and half white, are placed above the two circular, a black border white core, black core with a white border.

1, to realize black and white half round.

    .box{
        width:200px;height:200px; border-radius:50%;
        background:linear-gradient(90deg,black 50%,white 50%);
        margin:50px auto;position:relative;
    }

2, with: before pseudo-class garden implement a black border white core.

.box:before{
        content:" ";
        position:absolute;
        width:0px;height:0px;
        padding:25px;
        border:25px solid black;
        border-radius: 50%;
        background:white;
        left:50px;
    }

3, with: after pseudo class implements a round core black white border.

.box:after{
        content:" ";
        width:0px;height:0px;
        padding:25px;
        border:25px solid white;
        border-radius: 50%;
        background:black;
        position: absolute;
        left:50px;top:100px;        
    }

Tai Chi map rotation

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>太极图</title>
    <style>
    *{
        margin:0;padding:0;
    }
    body{
        background: #eee
    }
    .box{
        width:200px;height:200px;
        border-radius:50%;
        background: linear-gradient(90deg,black 50%,white 50%);
        margin:50px auto;
        position:relative;
        animation: tj 3s infinite linear ;}
        .box:before{
        content:" ";
        position:absolute;
        width:0px;
        height:0px;
        padding:25px;
        border:25px solid black;
        border-radius: 50%;
        background:white;
        left:50px;
    }
    .box:after{
        content:" ";
        width:0px;height:0px;
        padding:25px;
        border:25px solid white;
        border-radius: 50%;
        background:black;
        position: absolute;
        left:50px;top:100px;        
    }
    @keyframes tj{
        from {transform:rotate(0deg);}
        to{transform:rotate(360deg);}
    }
    </style>
</head>
<body>
    <div class="box"></div>
</body>
</html>

Tai Chi map produced CSS3

Tai Chi map rotation

Guess you like