.clear{clear:both;}
body{background:#FF0080;}
#wrapper{width:800px;height:500px;}
#header{width:100%;height:100px;background:#00CACA;}
#content{}
#content #left{float:left;width:50%;height:400px;background:#E4EA0B;}
#content #right{float:right;width:50%;height:400px;background:#00F43E;}
#footer{width:100%;height:100px;background:#00CACA;}