Please help - Change to slide after specific time

Hi, I haven't found what I was looking for, so I am just going to ask you guys.

 

I am relatively new to storyline, have (some to little) experience with variables, though I am not sure if this is the right way.

 

The requirements for my latest project are: If the slide has been open for X minutes (5 I think), the slide has to change to another slide automatically. This is so we can "restart" the project when there is a time of no activity.

There is no quiz involved in the project.

This is for an interactive computer on a trade fair.

 

I am not versed in javascript or any of that. So I am wondering, if there is a way to implement this directly  in Storyline to the slides, in terms of a trigger "change to slide when 5 min are over". I am at a loss, and my boss wants me to do this on monday in ~3 hours, so I am happy for any help you can give me.

Cheers