<style type="text/css">
* {
 margin:0px;
}


#boxA {
 background:no;
}

#boxB {
 background:#0080ff;
}

#boxC {
 background:no;
}


#boxD {
 background:#0080ff;
}


#boxA {
 width:600px;
 height:200px;
 float:center;
}

#boxB {
 width:200px;
 height:450px;
 float:left;
}

#boxC {
 width:400px;
 height:950px;
 float:left;
}

#boxD {
 width:600px;
 float:left;
}


</style>