Black Elements of the film Taxi Driver

Taxi Driver tells the story of a post-Vietnam veteran Travis Bickle, a loner suffering from insomnia, was driving in the mean streets of New York City, and was slipping slowly into isolation and violent misanthropy.
Camera Ⅰ:
Taxi was driving through the mist against the black background. Then the mist expanded. From Travis Bickle's eyes, we can feel that the streets full of the neon-lit were like a hell, strange and horrible. Then he found a job to drive a taxi to pass the endless hours of sleepless turmoil. During his work time, he saw the "scum" on the streets every day; he e…