<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
#circle{
10px;
height:10px;
border-radius:100px;
border-100px;
border-style:solid;
border-color: red blue green yellow;
line-height:99em;
overflow:hidden;
cursor:pointer;
margin: 10px auto;
}
</style>
</head>
<body>
<div id="circle">11</div>
</body>
</html>