This AutoCAD Tutorial is which discusses how to use commands hatch on the floor plan design. You can see the floor plan is divided into four rooms that have a different hatch pattern.
To begin, first you can create a floor plan design, which you can shape. Next change the line shape on the floor plan into a polyline, so that every object to be given hatch, into parts which are more complex.
Once all the objects into polyline, then you can apply the pattern into the object using the Hatch command.
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