In Night 01, no one can reach you. In Night 02, Spring Bonnie can come to your office, but if you flip the cameras he leaves. Then, never leave the cameras until he leaves, or that will prompt a jumpscare. Same with Fredbear on Night 03. On Night 04, all the animatronics are present and they have no set path, and they move really quickly, even to appear in two cameras at a time, confusing you.
Fredbear asset and thumbnail by -MrMystery- Spring Bonnie by Goldogemania Spring Bonnie Jumpscare by 32227645012rd86 Thanks to Scott Cawthon for inspiring me.