Stuck on laying out your divs


#1

Here's my html

<head>
	<link type="text/css" rel="stylesheet" href="stylesheet.css"/>
	<title></title>
</head>
<body>
<div id="header"></div>
<div id="left"></div>
<div id="right"></div>
<div id="footer"></div>
</body>

Here's my CSS

.header {
border-radius: 5px;
color: #0088cc;
position: fixed;
}

.left {
border-radius: 5px;
color: #33bbff;
position: fixed;
}

.right {
border-radius: 5px;
color: #33bbff;
position: fixed;
}

.footer {
border-radius: 5px;
color: #0088cc;
position: fixed;
}

It keeps saying "Did you create a

with a class of 'left'?" What do i need to fix

#2

Nevermind I got it I needed to make two id's and two classes I got it know.