Use a photo of a staircase or the stairs in your home or a building you love to inspire you.
She knew there was no way out, but she kept climbing the stairs anyway. She'd been climbing them for what felt like numerous years but it was probably only a few hours. It was a part of her training. Climb climb climb.
At least the stairs she was on were pretty to look at. The entire thing was salmon pink which was such a bizarre and frenetic color for a staircase that it kept her awake. Not only that but on each stair was a digital screen that displayed random YouTube videos, news clips, scattered pieces of TV shows and movies, wedding videos, cartoons, etc.
So at least she was mildly entertained while she climbed. The supplement that she took helped manage the eventual burn that happens when you walk up a staircase for several hours. She looked around her and only saw stairs, stairs and more stairs. No doors, no windows, nothing but stairs. She might go crazy. Maybe she already has.