If you have no particular story to tell, then borrow one from someone else. This has worked pretty well for Shakespeare and pretty much every other great writer. The bible is good for plots, as are myths, fairy tales, legends, ballads, pop songs, and crappy movies that didn’t quite work (rewrite them so they do).Goodreads.com. (2019). Justine Larbalestier Quotes (Author of Liar). [online] Available at: https://www.goodreads.com/author/quotes/30033.Justine_Larbalestier [Accessed 23 Sep. 2019].
Michael Schilf writing for The Script Lab describes The Eight Sequences as a potential launching point for writing a feature script.
For each sequence in the outline Schilf provides brief descriptions of the elements to include.
Source: The Eight Sequences. (2019, April 20). Retrieved July 27, 2019, from https://thescriptlab.com/screenwriting/structure/the-sequence/45-the-eight-sequences/
In this article from Screencraft, Ken Miyamoto describes the basics of properly formatted scene headings and how they differ from sluglines.
Screenwriting Basics: The Keys to Writing Correct Scene Headings. (2018, December 05). Retrieved July 20, 2019, from https://screencraft.org/2018/07/22/screenwriting-basics-the-keys-to-writing-correct-scene-headings/