An origami tutorial for Turret?

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Hello myLotters !^^ I have a little problem, and I was thinking if someone from here will help me. Tomorrow it's one of my best friend's [and classmate in the same time] birthday. She will not have the birthday party tomorrow, but I want to give her something little. I was thinking to make her a Companion Cube from the pc game Portal[she loves that game], but I've kinda failed because I'm running out of time, because tomorrow in the morning I have a psychology contest T.T. Because I've failed with the cute companion cube, I thought I can make , tomorrow before the contest, that little robot from the Portal, Turret. I saw some origami with it on the Internet, but I couldn't find any tutorial...Can somebody help me with a tutorial for Turret? Thank you in advance!