Auto-adding slides to a slider

Hey guys!
I’ve been setting up a website to make use of a couple sliders that auto-change on a page.
Each one at the moment, has 7 slides.
They’ll eventually have a LOT more, so I need a better way to add more slides, other than copy+pasting a slide and changing the image and making a new combo class for it one by one.
There IS a way to do this, right?
Here’s the read-only.

Nobody has anything on this one!?