School infection

In school you are currently in your classroom and an alarm sounds off. Everyone is terrified. There is currently a virus thats spread across the globe. spread by a creature who lives around the center of the Earth where oil is found. When people where extracting the oil the creature came along with it and eating or infecting anyone in its path. When infected you first get a large black spot and it spreads it also grows tentacles and makes you loose control of your body and you turn into a mindless hungry creature eating and infecting anyone in your path. You have to move quickly before this creature can infect you or any others. However you don’t have any friends so you have to make them fast!