After this, the next line is written normally, including the new key. After key has been decided, one must decide on a time signature. These are the numbers that are displayed in fractional form at the beginning of the line, after the clef and key. This means that there are four beats in a measure. This means that there are three beats in a measure this is the time signature of waltzes.
Notes are next.
A whole note is an open circle with no stick. It gets four beats. A half note is an open circle with a straight stick, which gets two beats. A quarter note is a filled-in circle with a straight stick, which gets one beat. An eighth note is a filled-in noted with a stick that has a curved flag on the end, which gets half a beat.