I love this because it's modular, cool looking, and functional...no really, the figures can be placed all the way up and down so it is active terrain in that sense.
I've uploaded the videos to Youtube in a series of 4 "episodes" and again, so not a film aficionado, so it's a leetle rough in some spots, but it will hopefully get the job done so that you too can create these stairs. You can watch each segment and work along with them or watch them all one after the next. Really, whatever you decide to do should work. Please reach out if you need clarification. I'm happy to help you!