*{margin:0px;padding:0px;}
body{background:gray;}
#wrapper{width:1000px;height:1000px;background:cyan;margin:15px auto;}

#header{width:100%;height:20%;background:gray;}

#header h1{font-size:80px;}

#inner_wrapper{width:100%;}

#content{float:left;width:80%;height:640px;background:gold;}

#one{width:190px;float:left;height:600px;border:1px solid pink;padding:5px;margin-left:20px;}
#two{width:299px;float:left;height:600px;border:1px solid green;padding:10px;margin-left:20px;}
#third{width:199px;float:left;height:600px;border:1px solid gray;padding:5px;margin-left:10px;}

#sidebar{float:left;width:20%;height:640px;background:green;}

#footer{width:100%;height:20%;background:cyan;}