Digital Rain

A JavaScript / ProcessingJS rendition of the "code" from the Matrix movie.
A random character is created
This character appears at the top of the screen and runs downward like a raindrop
The character leaves a fading trail behind it
THe character at the head of the drop is significantly brighter than the trail
The character randomizes every update
Characters consist of the Japanese Hiragana alphabet and arabic numerals 0-9
Characters are all written backwards
The description of the original code used in the movie, from Wikipedia:
In the film, the code that comprises the Matrix itself is frequently represented as downward-flowing green characters. This code includes mirror images of half-width kana characters and Latin letters and numerals. The effect resembles that of the older green screen displays, since the letters leave a fluorescent trace on the screen.
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