Add what place every sequence holds by popularity

[El_chip]

I want to ask, where can I find guidance to learn the notes, and does anyone have a basic tutorial for beginners? - flappy bird

so there are 8 notes in any key, for simplicity lets go with the key of c major: ABCDEFGABC that's your notes that are "in this key" you can use notes "outside of the key" for a different sound. Anything that sounds good is good, there's no pattern to it, add what sounds good for the music.