Space Rush mobile game update - Sci Fi Doors - Ultra Low Poly (4 vertices)

I dedicated this weekend to create sci fi doors for my game Space Rush. These doors will open automatically when player enter zone. The idea is to have 2 separate components, one will go down another one up, something we all have seen many times in sci-fi movies, games and in books.
Doors looks like they have complex geometry but actually it's only 1 plane that have spec and normal map, so it should be very efficient for mobile devices.