How would i imitate F. Scott Fitzgerald's writing or Thoreau?

For an essay i have to either imitate F. Scott Fitzgeralds work, or Thoreau's. I have no idea which one I should do, or which one would be easier. If someone could tell me how to imitate either of them that would be great. I just have to right a 2 page story imitating their style... etc. HELP due monday june 6th