I was wondering if someone knows how to achieve the following (or if there is already an add-on which does this?):
I want the utilise the blank spaces on the left and right of my website as it seems a waste not to use it. I have seen https://www.ebuyer.com/does exactly this. They have banners/backgrounds on the left and right, with the main content in the middle. The images seem to be sticky (if that is the right word to use?) so when you scroll down the page, the images stay there. Ideally, this is what I'm after.
Any advice would be greatly appreciated.