The cube is used in this expect to create a double ceiling house to show that the house looks twice as big as its original size. With the privacy around the house, this cubed house has tall windows to allow the sunlight in to the house. And with sunlight in the house, it will have the illusion of a bigger house, especially when it is white too. With the connecting house of the slanted roof, it gives the illusion of privacy. Therefore contrasting and the balancing the amount of openness to the closeness of the whole building.