deleteHoles(...)
Lot --> deleteHoles()
@StartRule
Lot --> primitiveQuad(8, 6)
shapeO(1.5, 1.5, 1.5, 1.5)
deleteHoles()
extrude(3)
comp(f) { top: Roof | side: Wall }
Roof --> color(0.5, 0.25, 0.15)
Wall --> color(0.75, 0.72, 0.68)