Balcony Escape

Walkthrough:
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-get the knife near the flower pot.
-get the screwdriver under the right armchair.
-get the black box under the left armchair.
-get the 1st key from the back foot of the left armchair.
-click on the empty flower pot. 
-it will go to the middle of the balcony.
-dig the edge of the plant with the knife and get the numbers:
 "17 36 71 136"
-unscrew the screws of the balcony bars and get the wood.
-put the wood on the flower pot.
-put the black box on the front part of the wood. 
-then click on the far part of it.
-the ledder will come down.
-go upstairs.
-get the 2nd key under the door mat.
-go downstairs
-click on the black box several times. 
-it will turn .
-click under the box with the screwdriver and get the 3rd key.
-hit the pipe with the screwdriver and hear the noise of the hit.
-you will hear a different noise from one point of the pipe.
-use knife there and get the 4th key.
-enter 17 36 71 136 259 496 959" on the downstair!s safe and 
 get the 5th key.
-insert all the keys on the keys holes upstairs and escape.