Office Escape - Stage 3

Walkthrough:
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-get the music player part under the desk. 
 (click on the right drawers of the desk)
-get the 1st key on the floor at the same screen.
-click on the papers on the desk and get the yellow paper.
-enter "300? on the pc and get the note.
-the doors will open now.
-turn right and get the 2nd key behind the bookshelf.
-take off the green books on the shelf and get the music player.
-combine music devices.
-turn right and get the 3rd key under the flower on the table.
-turn right again and get the 4th key in front of the orange-
 yellow cabinet.
-enter the first meeting room.
-get the 5th key on the floor.
-enter the 2nd meeting room and get the 6th key behind the 
 left chairs.
-enter the 3rd meeting room and get the photo and the 7th key 
 near the flower pot.
-enter the room with white door at the right side of the stairs.
-get the 8th key on the chair.
-move the mirror to the left side of the room and click on the 
 mirror. get the 1st blank paper behind the chair.
-enter the kitchen and get the 9th key near the trash bin.
-get the black bulb from the 3rd drawer of the cupboard.
-enter the tv room and get the 10th key on the floor.
-click on the lemon tree and click it with the music player.
-get the 2nd blank paper.
-insert all the keys on the lemon and get the 3rd blank paper.
-enter the storeroom.
-look at your photo and move the items on the shelves like the 
 photo.
-insert the black bulb in the lamp and turn off the lights near 
 the door.
-get the 4th blank paper which is shown on the shelf.
-combine 4 blank papers you will see some squares.
-go to the kitchen and click on the cabinets on the wall.
-there is a mirror over the cabinet.
-click your blank paper on the mirror and
-see the marked places.
-go back to the tv room and click on the floor in front of the tv.
-get the key under the floor like the paper said.
-open the glass cabinet with fruit juices with the key and get one 
 of them.
-click on the stairs and go to the party.