Answers
1-Tap the pipe.
Tap the pipe in your inventory
Tap the pipe.
Tap the paper HINT 1-7-4-8-3
On the wall :
C-Y-O-D-W- (write the hint numbers below Letter)
1-7- 4- 8- 3
2-Tap the mirror twice to break.
Tap the light according to the letter and number.
C1-Y7-D8-W3 (Something happen.)
Where can I get the pipe?
in the ceiling above the mirror it’s a “T” pipe.
see image updated.