Dowfer

HI, Am totally new to this forum and also to Prestashop so if I have posted in the wrong place sorry. I am looking for a theme that I can put a background behind, something similar to the photo attached. I have taken some advice fropm a friend who knows a little about this and he has advised that the default theme cannot do this. Could someone advise what type of theme of if the know of a theme that I can use to get this done?.. I am using 1.6 Thanks Matt