" Most remember Hitchcock as a skilled storyteller, but what few know is that the director shot his movies using two separate scripts. The first, known as “the Blue Script,” was entirely functional. In it were all the tangible onscreen components, including dialogue, props, camera angles and set descriptions. The second script, which Hitchcock referred to as “the Green Script,” chronicled in fine detail the emotional arc, or “beats,” of the film he was shooting. Hitchcock relied on both scripts, but the Green Script reminded him how he wanted moviegoers to feel, and at what point, "

― Martin Lindstrom , Small Data: The Tiny Clues that Uncover Huge Trends