Q: Is this a 12-tone composition? A: No. Its what you might call anti-tonal (as opposed to atonal); it works like tonal music, but with the roles of consonance and dissonance reversed. Youll notice that the interval between entrances are the four notes of a diminished seventh chord (which contains two tritons) --- the most un-tonal possibility.
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: http://www.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: http://www.classicalarchives.com/