Then, you need to get outside the house. Climb over where the safe is. There you can smash a wall to get inside. Then, climb up where the elevator is. Up there is another wall to smash to get into a bedroom.
In this room, there is a note on the shelf that reveals this code:
2 - 4 - 6 - 1 - 3 - 5
Go down and turn on the generator. Watch the numbered fish on the wall move in the same order.
Go outside, down the bunker. Here you have the same numbered fish. Interact with them in the same code: