well, lots of instructions are in the project, and I do recommend downloading. I expect timing to be off unless you use turbo speed, and also the flash player's instrument library is not as good as Scratch's. Here, however, is where I will tell you why I made the project and where the music comes from. See, in school, I have just started Symphonic Band, and for the band, at the beginning of the year we have a seating assessment, so the teacher gives us a piece of music that we have to learn on our own and practice and perform (privately, in front of a video camera) and how well we play determines our seating/rank and it also is graded. I got the music (I play trombone), and when I was trying to figure out what it would sound like, I decided to transcribe the rhythm to scratch music blocks. eventually, I finished, and then I started playing around with it. I ended up with this project seeming likely to be the most interesting sounding to scratchers. so, to conclude, I have no clue where the music in this song originally comes from, since I was only given an excerpt. Enjoy.