I was little, around 5-7 years old, and I was playing outside in a place that looked like my childhood backyard. Then, me and my family had to hide underground because everyone was required to go to space and the government sent robots or humanoid monsters to kill everyone who didn't. The place we hid in looked like the spare room from my house, the hallway it opened into also looked like the second floor of my house. It had two mattresses, and the frame around the door was damaged, you could see the wall's frame (is that what it's called?). As time went on, people would disappear, and new people would reappear. At one point, when all my family was gone and I was with a group of college-aged men, The door was always open, but no one panicked. I think I could see a robot and a monster pass by. I thought that since people were beginning to slowly disappear but not reappear, I would be alone forever.