what you are downloading from any of these will be an .iso to flash onto an microSD card and it has the linux distribution handled.
if you download the Scrawl distribution I’ve got Scrawl, waaave pool ,spread (my colorizer), spectral mesh on the desktop as bash scripts to make running everything easier.
otherwise you have to open terminal get to the correct folder and make then run your script. It is much simpler to do this with the bash scripts like I have.
it is easy to add them once you have a linux distribution setup.
just go to github and download the folder and put it in the correct place.