This document provides a detailed analysis of the visual, audio, technical, action, and narrative codes used in the trailer for the thriller film Eden Lake. It examines how the trailer uses bright colors and calm music at the beginning to establish the main characters' happiness before shifting to darker tones and ominous sounds as their situation takes a turn for the worse with the introduction of a gang of violent teenagers. The analysis explores how camera angles, quick editing, and flashes of red are employed to build tension and suggest impending danger.