How to Move Footer Image Up

Hi,

So I'm basically trying to add a brown background with a white rectangle. I saved the background image and added it into the body, however it doesn't connect to the footer area for some reason. So I created a separate image file for just the bottom piece with the white crossing lines. However, when I add that in, the crossing part is too low and doesn't show up at the very bottom where the footer is. I am unsure of how to raise the axis in order to make it display.

https://gehna.ca

Thank you so much.