How to change the background on Blogspot?

How to change the background on Blogspot?

Easy.

So on the top you have written things like Your email and new post next to New Post it says Project you click on project.

I show you a picture what next ok.

 So you click on the one i circled.

Then you will go back to your blog but you will have this at the top.

Its in Polish sorry....

So as i circled you click on the second one witch says background.

Then you click on the box that is next to background and there is just one colour you click on delete photo and then add your own one.