A script or screenplay can be an original piece, or based on a true story or previously written piece, like a novel, stage play or newspaper article. At it’s heart, a screenplay is a blueprint for the film it will one day become.
Professionals on the set including the producer, director, set designer and actors all translate the screenwriter's vision using their individual talents. Since the creation of a film is ultimately a collaborative art, the screenwriter must be aware of each person's role and as such, the script should reflect the writer's knowledge.
As a professional writer, I’m experienced in this field of writing. Feel free to contact me for further discussion.
Regards,
Your Wordman
Richard Mitchel