I like in the first film how the person made the lines and shapes to represent the instruments. When the guitar was playing, there were horizontal lines to represent the horizontal strings on guitar. Then, when the bass was playing, there were vertical lines to represents the vertical strings on the bass. The artist also emphasized one string by bolding one of the lines if the music was plucking one of the strings individually. In the second film, the artist used circles to represent the drums. When the drums started playing faster, there were more circles that appeared on the screen.

I also liked how it looked like people dancing in the second film. The artist used two silhouettes that would spin around one another and this gave the impression of two people dancing. There were also other shapes that would glide in and out of frame to give the impression of multiple people dancing in a room, maybe.