Please Help - Select Previous Item

I just completed “Creating an Expandable Text Box with a Show-More Link Using Wix Code”.
Everything is working as expected.

I’d like to add a 2nd-4th text box. I want to edit “fullText = $w(”#dataset").getCurrentItem().field" to instead get the next item (2nd, 3rd, 4th) is there a way to do this with getItems() or something?

Any ideas?