How do you change painter background?

So, after an agonizing day I got my site to work again. But, I totally forgot how to change the background on my website from peddle to black.

http://ImagineTheEnding.net/

This is how my style sheet looks like:

/*
Theme Name: Painter
Theme URI: http://www.marcelomesquita.com/tema-painter/
Description: A simple theme, with solid colors and a few pictures… but highly customizable. The highlight of this theme is the possibility of customization through the administrative area, allowing the choice of colors for each item of the site and upload the header image. Valid XHTML, Valid CSS.
Version: 1.1
Author: Marcelo Mesquita
Author URI: http://www.marcelomesquita.com/
Tags: custom-colors, custom-header, fixed-width, two-columns

Copyright (C) 2009 Marcelo Mesquita

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
*/

html {
font:normal 12px Arial, Helvetica;
background:url(http://2.bp.blogspot.com/_KI3IRH6RxSs/S-uuLsgGJ3I/AAAAAAAAA5E/AA5mWBMLIvo/s1600/mat-black-lg.jpg) repeat !important;
}

.aligncenter {
display:block;
margin:auto;
}

.alignleft {
float:left;
}

.alignright {
float:right;
}