i first tried that strategy of closing both doors and opening them when the bar is at 2, meanwhile occasionally checking on Blank. when i reached around 70% power at 1AM, i realized that i'm probably doing the strategy wrong or something so i decided to play the night like any other. didn't have high hopes since.. you know, 70% at 1AM but was still gonna pull through as much of the night as i could, aaand it was actually seeming possible! then by the end with around 10 secs left of the night, Blank punched the window. though i was still hopeful i could finish before he actually attacked since he sometimes has very long intervals between breaking the window and attacking. and just in the nick of time...

6:00AM!!!!!

this i pulled off just a few minutes ago so decided to document.

EDIT: this is also the first ever all max mode i've ever beaten. also, after this achievement i think i should take on The Tubbyland Archives: Act 1 as i've heard it's a pretty difficult fnaf fan game.