Climb to the highest level and go to the right. Use the lever from the green room with the machine. When Tommy and Beak-Beak will be in the car, click the line and follow it (to the right).
You will come to the dark place, go to the end of the route - you will see the third picture (remember it) - the last hint to the picture puzzle.
Go back the same way. Click the metal wheel on the wall. When you will come to the platform, go to the left and climb two levels down.
You will come to the pink room, where click a panel with picture puzzle.
Picture puzzle in pink room
Click the panel with picture puzzle. On the first place set the picture from the overexposed room (where the dog was after going through the first tunnel), on the middle set the picture from the room with the octopus (where the dog was after going through the second tunnel). As the last set the picture which you have seen after driving the car cable. You can move pictures vertically and horizontally. Finally push the yellow button. An example solution of this random puzzle is on the screenshot above.
Go into the open passage at the left. In the rotating room move the lever which is close to the entrance. Go right. A metal bolt will hit the button. As you can see, you need to repeat the same pattern which is above the bolt. The bolt on the right side will show you the symbol from the beginning and the end, the bolt on the left - symbols from the middle.
When you see the first symbol, go left. When the left bolt hit, go a little bit to the right and again left. The left bolt will hit again. Go right - the right bolt will hit again.
When you get the right pattern (like on the screenshot above) go left and back to the pink room.
There click pink egg in the wall and talk with Abrahant Lincoln, who will give you a hint to the another puzzle. Remember the sequence: first element 2 times, second 3 times and third one time.