Follow the red line. You must add 1 if it goes to the right and add 2 if it goes to the left.
- 2 + 1 = 3
- 3 + 2 = 5
- 5 + 2 = 7
- 7 + 1 = 8
- 8 + 2 = 10
The numbers on the left side in order (top to bottom): 2,7,5,10.
The numbers on the right side in order (top to bottom): 3,11,12,8.
Elevator opens. Welcome to level 9.