Allowing learner to navigate own path from menu

Hi 

I'm trying to create a course where the learner can choose the menu options in the order they would like rather than me forcing them to choose in a certain order.

All scenes will come back to the same menu once completed but my question is how can I indicate on the menu that they have visited that option?

My knowledge of variables is pretty weak so I am guessing that is what I need to do?

Any help or suggestions would be greatly appreciated

Tks

Saffron 

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