#upper_left {
width: 125px; height: 125px;
position: absolute;
top: 0; left: 0;
background-image: u rl("http://plainicon.com/dboard/userprod/2800_a1826/prod_thumb/plainicon.com-50183-16px-db3.png");
background-repeat: no-repeat;
}

#upper_right {
width: 125px; height: 125px;
position: absolute;
top: 0;
right: 0%;
background-image: u rl("http://plainicon.com/dboard/userprod/2800_a1826/prod_thumb/plainicon.com-50183-16px-db3.png");
background-repeat: no-repeat;
}

#lower_left {
width: 125px; height: 125px;
position: absolute;
bottom: 0%; left: 0;
background-image: u rl("http://plainicon.com/dboard/userprod/2800_a1826/prod_thumb/plainicon.com-50183-16px-db3.png")
background-repeat: no-repeat;
}

#lower_right {
width: 125px; height: 125px;
bottom: 0%;
right: 0%;
position: absolute;
background-image: u rl("http://plainicon.com/dboard/userprod/2800_a1826/prod_thumb/plainicon.com-50183-16px-db3.png")
background-repeat: no-repeat;
}