Boolean Difference Tower

This video is a tutorial of making the Boolean Difference Tower in Rhino Grasshopper. Grasshopper script contains 'Rectangle', 'Extrude', 'Graph Mapper', 'Perp Frames', 'Project', 'Join Curves', 'Arc', 'Deconstruct Brep', 'Loft', 'Cap Holes', 'Scale NU', 'Solid Difference', 'Rotate', 'Contour(EX)', 'Scale', 'Pipe' components.