How to have a background stick while sections move over it.

I cant seem to find coding for having a background stick while the website scrolls though. Like having a transparent section with a background image behind it

You could ask here, though it looks like a few people who managed to add this to their website are having issues:

Sorry this isn't the solution, but might get you there talking to these people.

Something like this?

https://codepen.io/isamrish/pen/XQqLym