How do you determine the five lines of attributes of a building

Building five lines of attributes, usually divided according to its appearance: for round, semicircle shape of the building, five line of gold.

For the rectangular shape, l-shaped building, five lines of wood.

Appearance of wavy or several round in a building, for the triangle shape, sharp shape of the building, five lines of fire.Glyph of buildings for the square shape, well, five line belongs to the earth.