A further refinement of my z80 Digital Rain. For normal ZX81 users you’ll notice the drops start at random locations in the top half of the screen. For Chroma users, it adds different drop shades that are closer to the original.
JSZeddy, by Erik Olofsen based on JSSpeccy and Z81 emus.
For programs that don’t auto-run, press R then ENTER.
Also you may need to click on the applet to enable keyboard entry.