Trigger collapse previous when next section is clicked

I have not been able to figure out how to automatically collapse a section when the next one is clicked. It works once for me with some of the shortcode/CSS I found, but not with the next one.

Basically just so:

Section 1: open when the page is loaded, automatically collapsed when Section 2 or any other is clicked
Section 2: closed when the page is loaded, open when selected, automatically collapsed when Section 1 or any other is clicked
Section 3: closed when the page is loaded, open when selected, automatically collapsed when Section 1, 2 or any other is clicked

etc.