trainspotting themes and binary opposites:

The theme of the past vs future is prevalent in the film as the scene in which Renton is in a club later in the film as he narrates how everything shifts like music, drugs, and people as techno plays in the background and also the soundtrack has a lot of techno reinforcing this idea of changing times.
An earlier scene near the beginning where Renton is from another bar, too
Contrasts with the later scene to express the change which is occurring as the earlier scene shows people drinking alcohol as people dance to typical 80s music, whereas the later scene shows people on ecstasy and the places where these scenes take place are different as the previous episode in Leith.
And the later scene in London also takes place a drug change as Renton talks about ecstasy becoming much more popular as the popularity of heroin losing popularity as this change in the film shows a shift in culture from the 80's to the 90's within these two scenes. Renton develops as time progresses in the movie, as he was once stuck with his other friends which he now has Changed which leads to a different focus present in the film Betrayal. As Renton develops as a character he begins to hate the friends at the beginning and thus ends the film where Renton steals the money from the drug deal and escapes the money. He hated intimacy. And within the group of friends two friends Begby and Spud are on two opposite spectrums as Begby is the most violent individual in the group of friends as in one of the final scenes in the bar he shows this and how Renton is positioned in the middle of both of them as Spud is more childlike and scared as seen in the betrayal The scene as Spud sees Renton depart, and although Renton offers Spud somewhat to come with him, he doesn't show how scared of Begby and Sick Boy Spud is more. Heroin is a major theme in the film and how it impacts the characters and the world around them as the main character Renton uses heroin, and heroin is used as a complement to other themes in the film, such as family, as Renton's parents are portrayed as a force that tries to get him to stop seen in the scene of withdrawal as they held him locked in his house. Typically the scenes that the parents have are very bland with dark and dull colours that often make such scenes boring, Boring sound when heroin or cocaine scenes are usually found in brightly lit rooms with many lights and colours.