What's a html I can use to make my background image appear on the bottom right on...

[?.h]

...Tumblr? Well, actually the code looks like this:
body{
color:{color:text};
background-color:{color:background};
background-image:url({image:background});
background-position: center;
background-attachment:fixed;
background-repeat: repeat;
font-family:{font:body};
font-size:{text:font size};
line-height:{text:line height};
text-align:justify;
}

But I don't know how to use it properly. Help?