You will start by standing in a study room. Jump over the leather chair in front of you towards the TV. Now turn left and exit this room completely. In front of you there's a large staircase and to the left there is a carpet. Take a step on that carpet and turn right. To the left side of the staircase. There are two opening on the left side of the staircase. Walk towards the closest one to the stairs and once you've done that, you will see a couple of steps going down. Walk down these steps and continue to walk straight forward. You will reach the dining room area and now you have to turn left. Standing on the left side of the table. Now stand on the back of the chair. So now you should be standing in between the aquarium on your left and the chair on the dining table and you're done.