The document provides guidance on using lighting techniques to effectively set mood and foreshadow events in a slasher film. It discusses how natural lighting can establish a sense of safety while low-key lighting creates tension and darkness. Specific lighting setups are proposed for indoor and outdoor shots, including the use of softboxes and reflectors. A silhouette shot of the villain and low-key close-ups of victims are also described to ominously conceal details and identities.