The program was limited to a living area and a working area, being as flexible as possible so as to be able to accommodate the extensions of the house itself on the lower floor. The second floor is divided into two longitudinal spaces: one constructed;the other empty. The first is defined by birch plywood panels which fold out or close up according to the functional demands of the space. This contains the bedroom, the stairs, thhe toilets and in the future, a possible kitchen area. The empty space, the living room, is created from the relationship with the two exterior elevations and the desired relation with the constructed area, extending or reducing its area. The stairs unfold below. Hanging from the roof, the stairs descend and create a relationship with the regular space under the staircase which reach 10 meters high. This relationship between a clear geometric space and a volume (the stairs) is adaptable, in its desired condition of a cocoon, so that its translucent skin create transparencies and shade. unfinished work.