body
{
background-color:#E6E6E6 ;
background-image: url("papier.jpg");
background-attachment: fixed;
background-repeat: no-repeat;
background-position: center center;
}

#contenu {
background:url("symbole-outils.jpg") no-repeat left top, 
url("symbole-outils1.jpg") no-repeat right top,
url("architecture-moderne.jpg") no-repeat left bottom, 
url("architecture-moderne 3.jpg") no-repeat right bottom;  
}