Set different background images for specific pages

Hi Guys,
I’ve been trying to set background images for some specific pages on my site
using:
body.page-id-127 {
background: url(‘http://thatfootballgame.com/wp-content/uploads/2016/08/blank-scroll.gif’);
background-repeat:repeat-y;
}
in the custom css section of the theme config. Where page 127 is the rules page I want the background on.

Nothing changes on my rules page?? Any ideas where I’m going wrong?
Thanks
Stephen