Well first you start off with the ideas that you wont to base your story off of just start putting thoughts together in your head about whatever you your writing just put all your inner thoughts and examples on one sheet of paper and feed off of them when your writing your paper go back and revise for the final draft that your going to write , all there is to writing a draft is your ideas and inner thoughts you come up with.
A ruff draft is like the essay u will be writting but it has many mistakes that you will have to fix, or a partner has to fix(it depends what your teacher wants to do) then then with all the revised things you fix it up and your essay is done ps: am writting a ruff draft