You are sleeping in your bed, when you get an emergency alert on your phone. It reads "Alert! This is not a drill. Extra-terrestrials have begun attacking the world. Gather as many supplies as possible and stay indoors. Looting is now legal and Emergency services will be unavailable. This may be the end. Pray to whatever god you believe in. Good luck." Outside your window, you see lights moving across the dark sky. Red, blue, green. You hear screams and gun-shots in the distance. What do you do?