[dancer-users] Designing a route for a long survey

I have a friend who needs me to develop a page which is a long survey, There is some skip logic needed, for example, if users birthday is before x date skip to question 5, if answer to question 12 is 'no' skip to question 16, but nothing too complicated. I nevertheless am struggling with how to design such a route and was wondering if anyone perhaps knew of any similar examples. Rciahrd