The first thing you have to do is turn the knob right. You have to turn it around 6-8 times. On that last turn, you turn to 41.
The next thing you do is turn the knob left and PASS 13 once. Then continue one more full rotation until you get to 13. After stopping at 13 you will turn the knob to the right again, and go straight to the number 4.
Now you pull the lever above the lock and open your locker.
