Indeed. More like a grimoire now
Except that the pages aren't look like a literal page
Give me a break you two. I don't know how to make the content's background looks like an old pages, "yet". *back to readers* Hmm, why not let me walk you through how to create something like this? Should be nice to be able to decorate your blog.
Even though you only changed the background
And also the header's background
And changed the color of the content's background
And changed the font family of header's title and description
Argh! You guys are so noisy! I'm starting this tutorial! *get into a lab coat and put on glasses* I'm going to assume you already have a blogger account and a blog.
First, let's try changing the background.
1. Go to your blogger admin and click on 'Template'.
2. On Template, click on 'Customize'.

This will open a page with title 'Blogger Designer Template'. Now...
1. Click on 'Background', then click on the down arrow beside the current background image, whatever it is. This will pop up a window.
2. Then on the newly popped up window, select 'Upload image', then click on 'Choose File' button. This will pop up another window, where you can pick an image from your computer. Also, if you want to make the image fill the whole background, as recommended, the image dimension should be 1800x1600 pixels(px).
3. Then click 'Done' button and 'Apply to blog' to finish changing your blog's background image.

After applying your image, it's nice to play with these three options (If your image is not around 1800x1600 px).
1. 'Alignment' will position your image depending on your choice.
2. 'Tile' will repeat your image until it fills the screen (To see the effect, use an image that has smaller dimension from 1800x1600 px).
3. 'Scroll with page' will move the image as you scroll down the blog if you tick it and will make the image fixed to your screen if you don't tick it.

That's for putting up custom background, now let's get on to how to change the header background.
First you need to...
1. Go to your blogger admin and click on 'Layout'.
2. Click on the edit link on your blog's header.

A window will pop out. Now you can...
1. Either get the image from your computer, or from the web by pasting the link of the image.
2. Set the position of the image, if it's ready. 'Behind title and description' will place the image behind the title and description on your header, if you have them. 'Instead of title and description' will make the image replace the title and description, so you can't see your set title and description. 'Have description placed after the image' will put your set description under the image.

After that, just hit 'Save' and your image is on the ride.
...Very interesting
...Or not
Yeah, yeah. Like your comments are more interesting.
If my tutorial doesn't satisfy you, perhaps you might want to take a gander on these sites I got my info from.
Click here to see how to change background image.
Click here to see how to change header background image.
Background image taken from here.
Header background image taken from here.
Credits go to their respective owner, if they are needed.
Hmm? You want to know about these two guys? I could introdu... Ack! *tackled*
We shall introduce ourselves in the next post
Stay tuned until then
*is being sat on* Meh, fine.