How to draw the gossip on the beams, is it innate or acquired or a fish picture of yin and yang?

If you use it, use divination the day after tomorrow. Nature is the body, and the day after tomorrow is the use.

Actually, you don't need to draw anything. In the past, some people used cloth and cinnabar to draw eight diagrams wrapped in the middle of the roof beams, facing down, but rarely.

According to the need, you can hang gossip outside the house or on the doors and windows in advance.

Bagua mirror (with concave mirror or convex mirror in the middle) is often used now.

For reference.