100 Gates Level 13 Walkthrough

a compass and chair, when you move your device / phone the compass direction will move
100-gates-level-13
the answer to pass this gate quite difficult, so make sure you follow this guide if you stuck

100 gates gate 13 solution :
first click the button on the chair, there will be a hint code :
M + 1
F – 1

now you need to move your device until the compass looks like this :
100-gates-level-13-walkthrough
N facing top left
R facing top right

wait for a couple of seconds then the red button will turned into green !
then the chair will move
now click the painting to open the door !