At what stage? the first Office of locations where everything starts as a person or where it is still dark and without light, the third location of Fnaf 3.
There are a lot of such hints, first a hint, then clicking after the disappearance of this prompt, you can go to the second stage in the second stage, if I'm not mistaken, you first need to wait and then click on the hint or skip the dialogue on Enter or the left mouse button.