Board Thread:Off Topic/@comment-26073440-20180915165030/@comment-26877467-20181105220744

Step 1: Aquire a bus.

Step 2: Make the roof higher.

Step 3: Copy the floor and place it above the seats.

Step 4: Copy the seats and set them on top of the floor copy.

Alternatively, you could just remove parts from a triple-decker bus, or you could take inspiration in your design from the double-decker couch.

A mathematical proof