In the game "Udon's Inn", how to decorate the main building:

1. Open the game and click to enter any room.

2. Purchase materials, click on the sofa icon to purchase all materials used to decorate the room.

3. Divide the living area into 3-4 areas and use different types of floors in different areas.

4. Place items in corresponding living areas, such as placing the toilet sink in the bathroom.

5. Separate living areas and use different types of cuts to separate living areas from each other.

6. Detailed adjustments: Adjust the details of the living area, add or remove some decorations, and the layout of the main building is completed.