body{
	font-family:Arial;
	background:url(m.jpg)100000%;
	}
header{
	width:80%;
	background-color:Black;
	color:Yellow;
	margin-right:auto;
	margin-left:auto;
	padding:15px;
	overflow:hidden;
	}
	nav{
background-color:Yellow;
}
footer{
background-color:Yellow;
font-size:300%;
}