[Plugin: jQuery Colorbox] Running slideshow automatically

I am using Nextgen Gallery and Colorbox at the same time here
https://xenahotel.com/?page_id=38

I want the thumbnail to rotate automatically. So I attempted with the last two images (in bottom) with Colorbox:
https://xenahotel.com/wp-content/uploads/2012/06/CIMG3701-300×225.jpg
https://xenahotel.com/wp-content/uploads/2012/06/CIMG0627-300×225.jpg

Well, they don’t move although in same group (colorbox-123 class). The images only rotate when I click on one image.

So the question, how do I make the images rotate like this?
https://tajmasago.com/

https://www.ads-software.com/extend/plugins/jquery-colorbox/