Note: I don't own this, I found this off reddit, sadly my pea brain was so concentrated on the story I forgot to see the user. But, hope ya enjoy.
There was a little boy sleeping during the night. He hears footsteps approaching his room. He slowly opens his eyes, squinting as the door opens a creak, then fully, to reveal a human like figure. The boy can't quite make out who it is, or, heck, if it's even a human. The boy does see though the figure holds the corpses of his dead parents. After propping them onto a chair, the boy sees the figure writes something on the wall with the blood of the corpses. Then, suddenly, the figure dashes under the boys bed. The boy can hear the breathing under his bed. The boy smartly pretends to have been sleeping through all of it to not get killed like his parents, although he is really trying to figure out what is on the wall. Eventually his eyes adjust to the darkness and he can see what the figure has wrote.
I KNOW YOUR'RE AWAKE.