This is an assignment you perform in front of other students. You essentially need to make a silent conversation between yourself and the "aliens" to try to figure out what you are saying to each other. That is as much as I can help you with, as I have no way of demonstrating it for you :)
You need another comma after the word "think" because it's a parenthetical expression and is set off from the sentence.
The overall moos is Gloomy
