Digital rain
Digital rain, or Matrix code, is the visual effect of vertically falling computer code popularised by the 1999 film The Matrix. The code is a way of representing the activity of the simulated reality environment of the Matrix on screen by kinetic typography. All four Matrix movies, as well as episodes of the spin-off The Animatrix, open with the code. It is a characteristic mark of the franchise, similar to the opening crawl featured in the Star Wars franchise.