only 4
4th 9

the only 4 means that there are only four numbers for the code box by the door, the other things are telling your what the 4 numbers are, so the 4th number of the code is 9 and so on =]

turned on the light?

look under all the drawers

use the coloured triangles on the white square on the wall

2 coloured pieces of paper, one blue, one yellow?

To find the first number of code: the paper with morse code.
To find the second number: use the "tablet" and put in colored squares .
To find the third: I don't know I try numbers beacuse I've got the others.
To find the fourth: put red triangles on the white square on wall.

Pick up the card you see on the floor while facing the door.
Turn right.
While facing the big bookshelf click on each one of the shelves. You will find some things there. Pick up everything you can (two red triangles,a red card and a paper that says only four which means that the password for the door has only four digits).
Turn right.
While facing the bed click on the pillows and pick up the black card.
Click above the bed. You will see a key which you can't pick up. Later on you will come back.
Return to your previous view and click towards the ceiling. Inside the lamps there is a red square. Pick it up.
Click down and then right.
You're now facing a window. Take the red triangle that can be seen behind the curtain. Click on the corner of the rug and pick up the green card. Return to your previous view and turn right.
While facing the desk take the red "square" and the piece of paper with the dashes and the stars. Open the top and the middle drawer and take the blue and the yellow card, the hook and a turqoise and a yellow book. Then return to your previous view. While facing the desk again click below the drawers to find a key!
With the key you have found you can open the bottom drawer and get a screwdriver.
The books should go with the books. Ain't that right?So zoom in on the books on the desk, click on the yellow or the turqoise book in your inventory and then on the row of books. The two books have been placed next to the others. Read the top line horizontally and do what it says (turn on lamp) Once you've done it a key will fall on the floor. Pick it up and use it on the bedside drawer. From there you will get a plaque.
Remember the key you saw but couldn't reach? Use the hook and the key will be yours. With this key open the left drawer of the big bookcase. From there you will get a key to open the right drawer and another red triangle. From the right drawer you get the pliers and the last red piece.
By now you have all the items and all you have to do is solve four "puzzles".
Use the piece of paper with the dashes and stars to decode the row that is written below. The capital letters spell "FIRST" and the lowercase letters "two" (first=two).
Place the five coloured cards on the plaque you got from the bedside drawer. If you place them correctly and push the button the words "second" and "four" will appear (second=four).
Turn to view the big bookshelf. Click on a spot left from the right middle shelf and a plaque with four screws will come up. Unscrew them with the screwdriver, break the bars with the pliers and voila the third number! (third=one)
Place the red pieces in the white square you can see while facing the big bookshelf and get the last number (fourth=nine)

Pick up the card you see on the floor while facing the door.
Turn right.
While facing the big bookshelf click on each one of the shelves. You will find some things there. Pick up everything you can (two red triangles,a red card and a paper that says only four which means that the password for the door has only four digits).
Turn right.
While facing the bed click on the pillows and pick up the black card.
Click above the bed. You will see a key which you can't pick up. Later on you will come back.
Return to your previous view and click towards the ceiling. Inside the lamps there is a red square. Pick it up.
Click down and then right.
You're now facing a window. Take the red triangle that can be seen behind the curtain. Click on the corner of the rug and pick up the green card. Return to your previous view and turn right.
While facing the desk take the red "square" and the piece of paper with the dashes and the stars. Open the top and the middle drawer and take the blue and the yellow card, the hook and a turqoise and a yellow book. Then return to your previous view. While facing the desk again click below the drawers to find a key!
With the key you have found you can open the bottom drawer and get a screwdriver.
The books should go with the books. Ain't that right?So zoom in on the books on the desk, click on the yellow or the turqoise book in your inventory and then on the row of books. The two books have been placed next to the others. Read the top line horizontally and do what it says (turn on lamp) Once you've done it a key will fall on the floor. Pick it up and use it on the bedside drawer. From there you will get a plaque.
Remember the key you saw but couldn't reach? Use the hook and the key will be yours. With this key open the left drawer of the big bookcase. From there you will get a key to open the right drawer and another red triangle. From the right drawer you get the pliers and the last red piece.
By now you have all the items and all you have to do is solve four "puzzles".
Use the piece of paper with the dashes and stars to decode the row that is written below. The capital letters spell "FIRST" and the lowercase letters "two" (first=two).
Place the five coloured cards on the plaque you got from the bedside drawer. If you place them correctly and push the button the words "second" and "four" will appear (second=four).
Turn to view the big bookshelf. Click on a spot left from the right middle shelf and a plaque with four screws will come up. Unscrew them with the screwdriver, break the bars with the pliers and voila the third number! (third=one)
Place the red pieces in the white square you can see while facing the big bookshelf and get the last number (fourth=nine)

When at the table, click on the yellow or blue "book" in your items then click on the yellow or blue book on the book shelf when you do that two extra books show up (blue and yellow) then all the top letter of the books read "turn on lamp"