Static/Fixed Background

[KeepItLegit]

Hey guys, i was wondering how i'd make my background a Static Image

 

I'm using the Madame Prestashop Theme

 

And this is my Global.css http://pastebin.com/JTT7bgRc

 

 

The site is https://keepitlegit.com/

 

How would i do it?

 

Thanks!

[vekia]

to body add: background-attachment:fixed;

background-image: url(http://keepitlegit.com/modules/wdoptionpanel/patterns/TRICKDESIGN_WEB_BACKGROUND_2013.jpg)!important;
background-color: #ffffff!important;
background-repeat: repeat !important;
color: #7E7E7E;
font-family: Arial, Helvetica, sans-serif;
background-attachment:fixed;
}