"Muse" - background and header, they have been designed for Blogger blogs, but you can surely use them in other blogs or websites too.
To instal the header > click image > view image > save image > upload to your blog.
1. Click the image > view image > save image
2. Go to blogger template designer, upload the pattern and choose alignment up middle and tile.
3. NO scroll with page.
4. Adjust the widths if needed.
5. Go to Advanced and choose the other colors, if you like. Let your imagination flow!