<-- It's probably a good idea to click the green flag. You can see the original video here: https://scratch.mit.edu/discuss/youtube/IvUU8joBb1Q
Big thanks to @Lataliat for the engine, it wasn't too much trouble to figure out. If you're wondering, the sheet music for this song is available at the author's website: http://wintergatan.net/Score/MarbleMachinePianoScore.pdf
