A stopping event list - this runs through the event list in order, then stops at the last item and repeats it each time the script is subsequently invoked.

This is often useful for things like ASK ABOUT topics, where we reveal more information when asked repeatedly about a topic, but eventually reach a point where we've said everything:

>ask bob about black book
"What makes you think I know anything about it?" he says, his voice shaking.

>again
"No! You can't make me tell you!"

>again
"All right, I'll tell you what you want to know! But I warn you, these are things mortal men were never meant to know. Your life, your very soul will be in danger from the moment you hear these dark secrets!"

>again
[scene missing]

>again
"I've already told you all I know."

>again
"I've already told you all I know."

class StopEventList :   EventList