When you use the ladder, you climb into a room that has the words saying "5 - no.2" in it. The other four rooms say "4 - no.4", "7 - no.3 and "9 - no.1" These codes make the number 9574. The door is now glimmering in an orange light.
After smashing the window open, you stare below outside before getting pushed. While falling, you pull a drug out of your pocket. When eating it, you get on the ground with no pain. Now you study your surroundings. There is a book, a pen, a ladder and a door locked with a code. What do you do?