Hello!
I would like to give utf-16 a big thanks for this CSS, it's free on their MySpace bio (Click on "utf-16" above) but please make sure to credit him/her as it is their work. They also have a CSS Collection (Again, give them credit!) if you would like to have a look at that. I am currently using the one linked in their bio and I honestly think that it is pretty nice. CSS is easy to apply, click Download on the one you want and a new tab will appear. Then you hold left click at the start of the CSS then drag your mouse to the end of it and let go. Right click the blue highlighted text and click Copy (Or press CTRL + C). After that you click Home > Edit My Profile > Scroll Down to CSS > Right Click the empty box > Paste (Or save yourself 2 steps and press CTRL + V. > Save and now you have a cool CSS background!