A room with a window through which the moon can be seen. A large clock on the wall.
It is 10pm, say.
A woman sits at a desk near the window working.
Lights down.
Lights up.
11:15pm.
The woman is watching a show on television.
Lights down.
Lights up.
12:30am.
The woman looks at the clock, suddenly realizing something she forgot to do today. Yesterday?
Lights down.