* {
 margin:0;
 padding:0;
}
 
 
#boxA {
 background:mistyrose;
}
 
#boxB {
 background:lavender;
}
 
#boxC {
 background:white;
}
 
#boxD {
 background:white;
}
 
 
body {
 text-align:center;
}
 
#container {
 width:96%;
 margin-left:auto;
 margin-right:auto;
 text-align:left;
}
 
#boxB {
 width:100px;
 float:left;
}
 
#boxC {
 margin-left:150px;
}
 
#boxD {
 width:100%;
 clear:left;
}