Generate a piece of music.  
X:1
T:Music21 Fragment
C:Music21
L:1/4
M:4/4
I:linebreak $
K:E
V:1 treble 
V:1
 B, | E E/F/ G B, | =D D E C/B,/ | A, A, B, ^D | E3 A | G F E G | B G A B/>A/ | G F E G | B,3 A | %9
 G F E/F/ G/A/ | B B/G/ !fermata!A B/>A/ | G F E G | B,3/2 C/ !fermata!=D C/B,/ | E E/F/ G B, | %14
 =D D E C/B,/ | A, A, B, C/^D/ | E3 x | %17  