I tried to add a back ground from this
website, but I think you may have to pay for the back ground to be able to keep it. Maybe it's designed to expire, causing you to go back to the site... or maybe just get frustrated and take the darn thing back off of your blog and go back to a pre-designed template from blogger.
Either way, I'm settled on this background for now. I'd like to find a cool, cute, modern background for my blog, but doing that is at the bottom of my to do list and I'm not willing to pay for it at this time.
So, here you go... for the three readers that keep up with my blog. :)