How to create AB testing popups in GTM?

Question

Google

There are several popup windows. You need to show each of them in turn for each unique visitor after 2 minutes. being on the site (the user can go to the pages at this time). The question is how to organize this business in Google Tag Manager?
I'll add it to my list of requirements:

• popup opens after 120 seconds of session
  
• user unique
  
• A-B alternate display of pop-ups
  

Thank you!