Adding thumbnails slideshow

I’ve tried adding code, using the custom fields, plugins and nothing works ??

ok now i’ve got thumbnails… but ive added two and the slideshow wont work.

where am I adding or what am I changing the code in the gallery.php to make this work?

check out the theme author’s post –
https://www.blogohblog.com/wordpress-theme-digital-statement/

I’m trying to follow but I think I need a little bit more direction… hopefully someone can help me out please!

got it!