VBA to generate and draw vertical and horizontal lines following some rules

I have ground & ceiling geometrical data given in X, Y coordinates, which I plotted in thick brown in the chart below.
I want to add and plot vertical and horizontal lines (constituting building blocks) in between ground and ceiling; following some rules as follows:

# Vertical Lines
Shall be established every 4 feet apart. The lines' length is an even number with 2 feet increment (i.e. length is 2,4,6, or 8, etc.) as height permits at that location.
The vertical lines should NOT intersect with the ceiling. Each has to stop at least 2 feet before it hits the ceiling.

# Horizontal lines
Shall also be established every 4 feet apart. The lines' length has to be an even number with 4 feet increment (i.e. 4, 8, or 12, etc. …to whatever it takes)
The lines should not intersect with the ceiling's side slopes, at least 5 feet needs to be before hitting sideways

The lines should end up creating a proper outline of building blocks (rectangles/squares) in an organized format.

I manually tried to create some lines (with formulas) for illustration purpose (attached) but I appreciate if I can accomplish this perfectly with VBA.

It would be also fantastic at the end to provide the final number of utilized blocks and the surface area, but this is optional, plotting is more important!

I appreciate any help!

I also posted this in another forums, but I had no luck as I write for over 36 hours:
https://www.ozgrid.com/forum/index.p...ng-some-rules/
https://www.mrexcel.com/board/thread...rules.1167752/

Thanks frabulator for the feedback... Yes, I agree regarding the CAD thing, this is basically my ultimate goal. I appreciate your help ...

It would be fantastic if I could generate all the coordinates programmatically considering the maximum height and maximum width each line of blocks could get ...

Thanks again!