How to make a P.T Inspired Repeating Hallway gag?

Heyo, I’ll keep this one short. I’m wondering how I should go on about doing a P.T Inspired Hallway gag, where you go from point A to point B, and it repeats. Yet as it goes on things change and the game starts to differ throughout. How would I go on about making this? I’m a bit of a noob with UE4 Blueprints so you may have to explain to me like I’m 5.