How to make walking over a tarp the horse`s idea

This video (which is a summary of 3 videos) was taken a while back with my mare Sonja who was quite scared of going over tarps. Making a subsequently smaller gap between the tarp and the wall gave her an option to walk past it, which again made going over the tarp her idea not so much me forcing her over it.
Hope this video helps if you are planning on teaching your horse to be comfortable when walk over tarps 🐎✨