Urban parametric Design

Hello Everybody! I´m new in this forum and I need some help on the definition of an Urban Parametric Design. I´m trying to get something similar to this!

I´m currently on the step 2 so on the definition of the block but when it come on the building form I can not subdivided them but only create a solid element.
Any idea on how to do it? Any body could share with me the right code?
Below current status and relative Code.

Masterplan Scheme V9_ Mass Element_210504_.3dm (69.4 KB) Masterplan V 9_mass element.gh (46.4 KB)