I'm working on a train map and would like to add a contour line with a laser. Has anyone attempted this? If so, how did you do this?

I'm working on a train map and would like to add a contour line with a laser. Has anyone attempted this? If so, how did you do this?

The answer to this student question can be viewed in the 1/10/2023 Q&A Meetup at the 01:14:51 timestamp(must be logged in to watch).