controls:

click the UI at the bottom or use hotkeys
[M]ODE: switch mode 1 ~ 4 (or use number keys)
[F]ADE: toggle fade on/off
[S]PARKLE: toggle sparkle on/off
[C]LEAR: clear all

and
[E]XPORT: export as png
space: toggle play/pause

variables:

6 Spakle Colors: Blue / Purple / Pink / Green / White / Gold
3 Wave Levels: Small(30%) / Medium(50%) / Large(20%)
Inversed: Yes(20%) / No(80%)
Full Height: Yes(10%) / No(90%)
Timing: Sync(60%) / Async(40%)
Stroke: Hard(80%) / Soft 1(10%) / Soft 2(10%)

there are 4 modes to “fall”. you can combine the modes with fade & sparkle to get different effects.
press “E” to save as png. if you want to print it out as a postcard or whatever, append &ratio=2 to the URL to run the @2x version. (maximum 5)
(sorry i can't make them totally the same thing, but close)

i hope you do enjoy it.

made with p5js