Only one, but the light bulb really has to want to change.
Yarn.
None he's still clinging to the old lightbulb.
I I
He holds the light-bulb over the socket and waits for the world to revolve around him.
0, the light bulb has to want to change itself.
Just one, but it takes a really long time, and the lightbulb has to want to change...
