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Horizontal 'left' and 'right' buttons for image thumbnails in mobile only?!

I’m trying to make it so when in mobile instead of removing image thumbnails from my div to fit the mobile browser… To rather pop up left and right buttons to scroll through more options.

You can see this happening for the ‘poster’ images and ‘blog’ links on this site:

You can see the ‘left’ and ‘right’ option pops up when you hit a certain screen size on desktop. This helps keep the content the way they want on the front page without removing it.

I’ve copied this site to learn to mimic these actions and would love to include this.

Any help is much appreciated! Read only and active link below.

Here is my public share link:
(how to access public share link)

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