I dont have any background settings

Hello! :D
I have a little problem that i dont know how to fix. Im new in this thats why im here. What do i need to do if i want background settings to this theme? The only background i have now it a white page that i can't change.

My site: http://www.gamesquare.se/

Hi!

Unfortunately, there is no option to change the background without code editing.
There are several css files: style.css located in the directory of the theme and the others inside /css folder. Inspecting the page you will be able to find the line and the file you have to edit. Unfortunately, we don't provide such kind of services.