I’m not sure what you mean as I don;t understand what you are trying to do now.
The working example is in my codepen.
You seem to have changed the js and css and I don;t know what you are trying to do? My js was all you need to close the modal as you that was what you were asking. You didn’t ask to open and close it.
If you want different blog-pager buttons then create a different class for one of the sets.