Section 10 - Open sesame - Not for release
Universal opening is an action applying to nothing.
Understand "open sesame" as universal opening.
Carry out universal opening: now all doors are open.
Report universal opening: say "Open Sesame!"
Universal closing is an action applying to nothing.
Understand "close sesame" as universal closing.
Carry out universal closing: now all doors are closed.
Report universal closing: say "Close Sesame!"