body{font-family:arial;font-size:18px;color:black}
.clear{clear:both;}
#wrapper{width:100%;height:600px;background:gray}
.header{width:100%;height:100px;background:brown}
.content{width:100%;height:400px;background:cyan}
#left{width:50%;height:400px;background:orange;float:left}
#top{width:100%;height:200px;background:black;float:left}
#bottom{width:100%;height:200px;background:blue;float:right;}
#right{width:50%;height:400px;background:green;float:right}
.footer{widht:100%;height:100px;background:pink}