Not sure how to make background and footer work together

[goneahead]

Hi,

Sorry, I'm here - again. I've finally gotten my latest layout close to what I want, but I can't get the footer (I am using canvas for the footer) and background image (I am using body for the repeating image) to mesh correctly. If you scroll to the bottom, you will see what I mean.

I think I got the footer positioned right, but I need to add a margin to the bottom of my repeating background image? I can't seem to find the right coding that will let me do that. Any help would be appreciated!