If you are an aspiring screenwriter, and are not sure where to get started, there is a simple technique that I have learned in screenwriting class.
Ask yourself three questions
- Whose story is this?
- What does he/she want?
- What is in her/his way?
Lo and behold, you have the most fundamental building block a writer needs: Conflict.
Once you have figured out these three questions, and you have your protagonist and conflict, you can safely move on to your storyline, outline, first draft and finally, voila, you have a screenplay.
Watch any movie, and you will almost always be able to answer these three questions. They are inherent in human drama