HTML Tutorial

HTML

<html>
<head>
    <title>Creating-Button</title>
    <link href="../CSS/StyleSheet1.css" rel="stylesheet" type="text/css" />
</head>
<body>
    <div id="button">
    </div>
</body>
</html>

CSS

body {background-color:green
}
*{
   margin: 0 auto;
}
#button {
    background-color: pink;
    margin-top:30px;
    height: 40px;
    width: 130px;
    border-radius:50%;/*for making corners of div in round shape*/
    border:groove;
}

<---------------------->
<link href="../CSS/StyleSheet1.css" rel="stylesheet" type="text/css" />

this is of link css page..
# - this is id symblo.