<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
div {
width: 40px;
height: 40px;
border-radius: 50%;
background-color: #fff;
box-shadow:
0 0 60px 30px #fff, /* inner white */
0 0 100px 60px #f0f, /* middle magenta */
0 0 140px 90px #0ff; /* outer cyan */
}
</style>
</head>
<body>
<div></div>
</body>
</html>적용하면 아름다운 태양이 나온다.