conversation in game maker

I've written a game maker demo illustrating how to have a conversation with some limited variation.

There are separate arrays of optimistic and pessimistic phrases which are selected randomly in turn. These could be further expanded, I've only done a prototype.

Press spacebar to make the conversation alternate.

It's a small start to the more sophisticated grammars devised by Paul Goldenberg and Wallace Feurzeig in Exploring Language with Logo (MIT, 1987).