Short presentation
Building 4 has a basement (bunker), ground floor, first floor and a second floor.
The building can be accessed via wooden tunnels leading from the outside to the inside, which can be (partially) blocked using different materials.
An edge rubble layer (car) can be verified from the building.
On the upper floors, horizontal and vertical tubes for hiding places are built from tires.
To differentiate odors, intermediate floors that can be covered with different materials and detection boards at room height are set up in different rooms.
