Branching and Learning Paths but now what?

I am creating a course that has learning paths where users can choose which ones to start with.  But they must complete all 5 sections.  I have it set up so that when they complete one path, when they click continue, it returns to the slide where they can choose another path to complete.  But I am stuck on what to do or how to redirect out of this scene once they have completed all 5 paths.  I am picturing a "you have completed all 5 paths" slide to pop up, but how would I go about doing that?  Is there a trigger I can add that will recognize once they have completed all 5 paths instead of returning to the main slide again?  There is no particular order they have to complete the paths which is why I am now stuck.