Generates the design of a second level of a home that includes two symmetrical residential units. Each unit must have a furnished living room, a dining room for six people, a rectangular kitchen with dark stone finishes, two bedrooms with double beds and two full bathrooms. . Place a central staircase connecting the lower level to this floor, and use wood finishes on the floors to give a warm and inviting feel. Design the space to be functional, balanced and modern.