A "Digital Rain" effect:
-Varied text-content
-Varied drop-speed (varied delay for creation and destruction)
-Varied scale / zoom
-Varied visible portion
-Varied overall lifespan
-Varied horizontal positioning
-Editable vertical spacing
-Editable horizontal spacing
-Editable alphabet
-Random character mutations
-Accentuated leading "Rain Drop" character
-Background grid of characters
Though the initial creation all happens close to load/refresh time, the rain will eventually randomize more given the number of differing dimensions, so I did not bother to randomize initial creation. I also skipped that to stay under 100 lines of code :)