A Discovered Principle of Buttoning Doors

Let any door be a button door

you close with a button, baton or stick,

a little piece of wood on a nail

you twist by the side of the door.

Now forget about hinges: lift the door into

the hole or not. (Not being when the door is open).

All you need to make things work

is a board nailed across the breadth of the door

Just slightly exceeding the width of the hole.

You now add more buttons on either side,

stopping at four, two above and two below

the nailed-on board. This keeps the door from falling out

Or in, which is good enough.