Take the simple wireframe project you created for me in this contest [https://www.freelancer.com/contest/Simple-wireframe-elevator-mockup-in-threejs-with-motion-1432612] and modify it to make the camera move with the elevator.
When your elevator moves up or down, the camera moves along with it, on the axis of the elevator shaft (which we will call the Z axis). But move the camera slightly to the left or right as your camera motion follows the elevator in Z.
Your choice: the camera can either move straight along an X axis, or radially (rotating around the center of the elevator). The motion is slight: half the width of the elevator in X, or 15 degrees radially.