What is the feng shui pattern with coffins on the roof called?

The so-called coffin means that some people will use the open space near their homes to build sloping roofs or coffin-shaped huts or iron houses for other purposes such as garages or warehouses; Or in the process of demolition and transformation of old buildings, not all old buildings have been demolished, but one or several of them still remain. The new building has been built, and its old house is like a hut next to the new building. This is also called coffin evil spirit in geomantic omen. Stop? Once the shapes around the house appear, the house will be fierce. If there are no casualties at home, there will be bad diseases. Never be careless.