My thought is to give the sense of monotonous daily life. A girl, or else different people (to establish the generalization of the act on most people's daily lives) get ready for the day, going through the same, continual process (wake up, wash up, get ready, walk, ride, prepare, etc) for the day. However, as the minutiae goes on, the clips become more broken, similar, as if in a drunken haze. We see the establishment of routine in the form of compliance to society's norms. Perhaps at the beginning of the film, the surroundings or the people's clothing is white, becoming tainted with black (or vice versa). I'm thinking particularly of train clips, everyone on the train looking stagnant and expressionless as the sun drifts by, the people riding going through the motions. Seemingly alone, a singular person begins preoccupying themselves with other means besides what's included in their typical day. Playing the piano, resting against windows to think, and cutting out snowflakes to pass the time.
In the end, the person is doing something involving a sharp edge (perhaps the scissors, possibly tacks), and gets pricked. Upon doing so, they see themselves bleeding a tiny bit, the color of the film (their world) returning back to them at an exponential rate. The film closes, leaving the audience to believe it wasn't until the prick--possibly alluding to love--that the person was able to being feeling and "seeing" things for the first time.
