Matrix Digital Rain for the ZX Spectrum 48k

My implementation of the well known Digital Rain (also referred to as Raining Code) effect, featured in The Matrix science fiction movies.

While the code rain animation is running, you can change the effects by pressing the following numeric keys:
7: set mode to "inverted drops"
8: set mode to "standard" (default)
9: set mode to "woman in red"

You can change the colour by pressing the following numeric keys:
1: blue
2: red
3: magenta
4: green
5: cyan
6: yellow

The Matrix Digital Rain for the ZX Spectrum has been coded in C language and built with z88dk using the ZSDCC compiler. It is my entry to the Matrix Challenge by Retro Programmers Inside.
Emulation powered by JSSpeccy.
Sinclair and ZX Spectrum are © Amstrad / Sky In-Home Service Ltd.