That;s why you use your IMAGINATION... CREATE something. you don't have to know everything. Make it up as if you were a writer for Bungie. create your own scenario within the Buried City of Mars. Also, it's very possible to make a good short story with only 300 words. And it takes skill to do so. Just use a small scene from a story you are thinking of and put it on the screen. A lot of what people are writing is really good.