se ond

html, body {margin:0px; padding:0px
background-image:url (img.jpg)}

#box {
Height:auto   ;
Width:100%   ;
Margin-left:auto;
Margin-right:auto;
}
#header {
Height:150px;
Width:100%;
Background-color:red;
}
#column {
Height:600px  ;
Width:50%     ;
Margin-left:25%    ;
Background-color:blue;
}