Q: Is there a way I could make the bar-graph scores myself?
A: The Music Animation Machine MIDI file player will generate this display; you can get the (Windows) software here: musanim.com/player/
There are lots of places on the web where you can get MIDI files; I usually go to the Classical Archives site first: classicalarchives.com/
Q: What do the colors in the bar-graph score mean?
A: In most of my videos, they mean something definite; in this one, they are just to help you follow the various lines. The use of color isn't completely consistent.
Q: Why is the last note so short?
A: A bug in my software. I wanted to get the video posted in time for the 4th of July, so there was no time to fix it. Sorry. Maybe I'll re-do this video.