How to make an ab-test in google analytics on certain pages of the site, on which the display changes depending on cookies?

Question

Google Analytics

There is a site on which you need to conduct AB testing, the content display changes on the page by returning cookies:
cookie_1 - display by default
cookie_2 - the second display option.
Analytics and GTM are connected to the site.
Tell me how to set up? There are articles on the Internet about anything, but with the participation of cookies, I could not find any tutorials or articles.

Answer 1

Good afternoon,
You need to adapt this article for yourself: check the cookie value on the backend and then show the option to the user. Should be possible without GTM rather than with it.

Answer 2

let the encoder put it in the template, the backend template