I like it! You should make it a download for a real screensaver! 
I don't know the js for starting a download of an exe, or making an exe from blocks.
Oh, I thought you meant from the project.
You can use Snapp! to convert a Snap! project to an executable. I don't know how make the download entirely inside a Snap! project.
this reminds me of computer lab (at my school), 9 year old me would just stare at the screensavers
Lol, : D
I don't think you can download .scr files with Snapp.
can screensavers be basically anything that moves?
For example: A bunch of clouds that repeat the gliding across the screen constantly?
Noice
I said
That extension is .exe
https://www.cs.csustan.edu/~lamie/ScreenSaverTest/How_to_Convert_an_Executable_File_to_a_Screensaver.pdf
I think it's pretty cool how the music is procedurally generated. That was pretty cool. I wish I could make something like that in Snap!, but the only available built-in instruments are chiptune waves which don't sound the nicest.
great!
Cool!