I don't know why some of the comments sections are not showing up. It's not something I'm doing.
Thanks to this graphics site and this blogger tips site, ds and I have figured out how to add a new background graphic to the blog header.
Now, if only I could figure out how to change the entire background!
But, one step at a time.
Edited to add: Thanks to Let's Talk for the tip on finding out how to add a background!