E7: escaping backrooms gone wrong

We escaped using a post-it note saying to stop at step 5,000, but when we found the hundred key code on the post-it note, we knew what it meant. We reached level X, an infinite staircase. We stopped at step 5,000 and got into the frontrooms, except everyone was clipped to a different part of the world. Hopefully I find them in the backrooms again.