It tells us where A is.

It tells us to repeat.

It tells us where do is.

It tells us to perform quietly.

d r m s l

d r m f s l t d'

d r m f s l

d r m f s

It includes two half steps, between mi and fa and ti and do'.

It includes three half steps, between do and re, re and mi, and ti and do'.

It includes one half step, between mi and fa.

It is made up of all whole steps.