1. Copy the code for your background
2. Log into Blogger / Blogspot
3. You are now in your Dashboard.
4. Click the Layout tab.
5. Click the Pick New Template tab and select Minima.
6. Click the Page Elements tab.
7. Click Add New Gadget.
8. choose the HTML/Java Script Gadget.
9. Paste the code into the pop up box.
10. Click Save to close the pop up box.
11. Click Save to save the Layout.