Delay on Cart Button

I have a add to cart button in a slideshow in a lightbox. I wanted to just have it on slide 2 … but I can’t add a Add to Cart button to just one slideshow. So I’m thinking I could just add a timer on the button, so it only shows up 3 seconds after load - which is the same time it takes for slide 2 to show.

Initially I was setting it up so that the lightbox would load another lightbox … but correct me if I’m wrong but that’s not possible, right?