background-image

background-position: left|center|right top|middle|bottom;

This background is a diamond or diamond wanna be, it is down the middle of the page, css code...

background-image:url(images/diamond.jpg);
background-repeat: repeat-y;
background-position: center center;
background-color: lightskyblue;
color: black; font-size:larger

Notice weasel at right top and another one at left bottom;