<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
*{
margin: 0;
padding: 0;
box-sizing: border-box;
}
body{
height: 100vh;
/* 让圆居中 */
display: flex;
flex-direction: row;
justify-content: center;
align-items: center;
background-color: black;
}
.father{
width: 200px;
height: 200px;
background: linear-gradient(45deg,transparent 50%,#e5f403);
/* 圆角：变圆 */
border-radius: 50%;
/* 让中心创建的用来遮罩的黑色圆居中 */
display: flex;
flex-direction: row;
justify-content: center;
align-items: center;
/* 关键帧动画，infinite无限次数 linear匀速 */
animation: abc 2s infinite linear;
}
.son{
width: 95%;
height: 95%;
background-color: black;
border-radius: 50%;
}
@keyframes abc{
from{
/* 旋转 */
transform: rotateZ(0deg);
/* 色相旋转 */
filter: hue-rotate(0deg);
}
to{
transform: rotateZ(360deg);
filter: hue-rotate(360deg);
}
}
</style>
</head>
<body>
<div class="father">
<div class="son"></div>
</div>
</body>
</html>