The HTML tag for which the follow rules will be set. The opening brace is begin the enclosure of the rules used. The default value is scroll where the text and the background will move when there is enough text to warrant the appearance of the scrollbars. This instance of it, the image will tile top to bottom. The other templates will use different repeats depending on which one is used.
Current value is white.
The -10000 is what G rard used for the scrolling background script. Other values can also be used. These are pretty self explanatory, this one uses a 12pt Comic Sans MS font that is normal not bold text. Surround the font name in either single or double quotes so OE will know it's a particular font and not a generic family name. You can find more about the generic family names in information that will be coming later on Cascading Style Sheets.