Someone

<style type="text/css">
body {
background-color:BLACK;
background-image:url("ENTER URL OF IMAGE HERE");
background-repeat: no-repeat; <----(if you want to "tile" an image so it shows up as tiles)
background-position: center center; <---(this centers your image the way i have it.)
background-attachment: fixed; <---(this is if you want it to stay in place when you scroll down, or show the image again)
}
</style>