Another horror favorite: Don’t Look Now (1973), directed by Nicolas Roeg, starring Julie Christie and Donald Sutherland. Set in Venice, it concerns a couple recovering from the accidental death of their very young daughter. Roeg uses the color red as a signature throughout the film: things are not always what they seem.
++. Yes, and not your standard Linux distro in design, never mind the hurdle of understanding Nix expressions and functional programming language. However, once tweaked, deployment on multiple machines is straightforward.