body {
 width:80%;
 margin-right:auto;
 margin-left:auto;
 background:black;
}
header{
 color:red; 
}
section {
 background:grey; 
}
article {
 background:white; 
}


footer {
 color:black;
 background:white;
 padding:2px;
 border:5px red solid;
 width:50%;
 margin-right:auto;
 margin-left:auto;
 font-size:1.5em;
}