Help with Javascript

Dear all,

So at the moment I'm working on something with WIX through javascript and I'm trying to get this work on WIX but I can't get it to work. It is about this in the video. This is something my organisation is working on. For a sort of platform for people who are low literate and have low digital skills. So this is about how to rent a house in a region in The Netherlands. On the left side of the screen we tell you what you need, and what needs to be done and on the right side you can do it yourself. So you learn and somebody tells you what you need to do. Now I'm trying to do the same thing below on a WIX page but the problem is, that I can't get the "Left side" of the link on the left side of the screen through WIX, but the right side is no problem. Does anybody have an idea?

Thank you in advance!