"The Scope of the Dark Room" by John Timmons

The story headline is "Keeping a Light Switch in Scope in a Dark Room." The story description is "Occasionally I have had requests about how to turn the lights in a room (making it a dark room) but then being able to turn the lights back on." 

Release along with the source text and a website. 

Use  American dialect, the serial comma, and no scoring. 

[Our room starts off lit by default so that the player will be aware of the existence of a light switch.]
The Foyer is a room. "Lovely little space this foyer is."

[The light switch is a standard device that is switched on initially and placed in the room.]
The light switch is a device in the Foyer. It is switched on. It is fixed in place.

[The following determines what is in scope for the player (in other words, what the player can interact with) and makes sure the light switch is available to interact with.]
After deciding the scope of the player when the player is in the Foyer:
	place the light switch in scope.
	
[When the player switches off (turns off) the light switch, the room will go dark.]
Carry out switching off the light switch:
	now the Foyer is dark.
	
[When the player switches on (turns on) the light switch, the room will be lit.]
Carry out switching on the light switch:
	now the Foyer is lit.
	
Test me with "x switch / turn off switch / turn on switch".