I am just starting to code in HTML, and I have received a contract to build a Contrsution website.
The client wishes to have a slideshow time landing page, which I have done, and then wants a button that opens another automated slide show to his offered services. (Decks, Add ons, Landscaping etc.)

He also wishes to have a button that opens to a gallery of previously completed projects for past customers as references.

I should mention that the popup slide show is currently in a seperate HTML, CSS, and JS files. which are linked with the button to open and close.

So I was able to place a button that opens and closes the slideshow to the offered services when clicked, but I am trying to have another button close the designated popup slideshow to keep it clean, as the popup slideshow covers up the original button once opened.

I have been unable to make it work using CSS, HTML and JS.