In this assigment, my focus of design decision is construction. I use dynamo to creat a 8 side rorational polygon building at first. The inputs variables are tower radius, mid height of the building. top height of the building and Mid&Top rotation degrees. Then I compute the total floor area, total cost by floor and area and cumylative insulation. At this point, I can generate the out puts for my study, and the outputs are total cost/floor area unit, surface area/volume, cost/insulatiom unit, floor area/volume. For the two cost related outputs, I want to minimize them. In order to maximize the space efficiency, I also want to minimize the surface area/volume and maximize floor area/volume.