Change Jquery Transition Effect on Lightbox.js

General information for the website: Retailer
Description of every page/module: Hi,

I need assistance changing the transition effect on my webstite:

http://wordpress-4836-10914-35297.cloudwaysapps.com/

When you open an image in the lightbox I need the forwards and backwards (next going right to left) and (previous going left to right) exactly the same as this website thegreensoccerjournal.com/classic-football-shirts/

This also needs completing today.

Thanks :)
Description of requirements/features: To change transition effects on lightbos the same as this website thegreensoccerjournal.com/classic-football-shirts/ going left to right and right to left where the image leaves screen and new one comes in. The transition needs to be EXACTLY the same as the transition on this website.
Similar urls: thegreensoccerjournal.com/classic-football-shirts/
Extra notes: