Minecraft Note Blocks - Portal Still Alive

This is the intro of Still Alive, made automatic with redstone and noteblocks.
Since the noteblocks only provide 2 octaves the song is not in the original tone.
Also i didn't continue it cause i would be forced to only play the melody and that would sound too simple in my opinion.

Seems i'm going to get this question alot, "How long did this take you?"
So the answear is: About an hour. Since i used INVedit i "just" had to build, and not gather any materials! :)

Also bout the timing errors on some spots, It's not because i placed them wrong!
Every tiny lag in the redstone makes it sound wrong. I've just set the timing according to the sheet music.