Breaking the Code to Be a Musician

Everyone Can. Be a Musician. Be a Codebreaker.
Numbers Clue:
The most important sequence on the page Should stand out in more than just one way The first four numbers are all you need To play a song along with me
Letters Clue:
To play a song along with me From letter patterns you will need three To get these right you won't need a glove But you will need to answer the clue above
Shapes Clue:
Now we have just one clue remaining The fourth sequence for entertaining To get it right you'll have to watch Or the code you will probably botch

Patterns - Numbers - Letters

Patterns - Shapes