There's Something Outside Your Window

I was given the prompt: 'There's Something Outside Your Window' and told to write about it. I wrote 3 short stories, and here are the two better ones.

You are up studying late, with your parents already in bed. Downstairs is empty except for you, and the darkness is everywhere. At 10:00, you hear the knocking. You look out the window and see that there’s somebody or something there. You can’t see their face, but their form is tall and thin. You go back to doing your work, dismissing the figure for a tree. Soon after, another knock. This one on the front door. You call out “Who’s there” but don’t get a response. You get up and walk to the door, nervous of what is about to happen. You unlock the door and slowly open it. “Hello?” No answer. You don’t see anybody. “Your jokes don’t work!” You cry out, refusing to admit that they really were scaring you. You hear a noise from behind the bushes in your yard. Slowly, the figure comes out. They walk towards you, laughing. Do you smile or scream?

It is always present. It is always watching. It’s presence fades at night, knowing you are finally prepared to fight it. You chase it down, stab it and hurt it, but in the morning it always returns more triumphant than before. It stalks you during the day, unseen and intangible. Slowly, it drains your energy, taking your happiness and awareness. You try again and again to kill it, but cannot. You can never get enough sleep.

(PS: Just in case I'm a bad writer, the first one is supposed to have either a lover or a monster outside, and it lets you decide. The second one is a sort of metaphor/ physical interpretation of sleep and tiredness.)