Answer:
I assume your making a sky scraper replica between 2 and 5 feet tall.
If im reading this correctly, you need to find a skyscraper that you like nd find the angels and line sizes and proportions, then reduce them while keeping them in proportion (i.e a line that equals the measure of 100 when reduced by 10 would be 10, not 13)
You need to show your work on paper for how you reduced your angels and lines.
Hope I was some assistance, if not my apologies :)