Generate a piece of music. It is monophony.  
X:1
T:Music21 Fragment
C:Music21
L:1/8
Q:1/4=84
M:2/4
I:linebreak $
K:F
V:1 treble 
V:1
 c | cA F>G | A c2 c/c/ | dc A>F | G2 z G | FG AB | c f2 d/d/ | cA G>G | F2 z c | cA FG | %10
 A c2 c/c/ | dc A>F | G2 z G/G/ | F>G AB | c !fermata!f2 d/d/ | cA G>G | F3 z | c2 c>c | A c2 c | %19
 dc AF | G3 z | F>G AB | c f2 d | c>A G>G | F3 z | c2 c>c | A c2 c | dc AF | G3 z | F>G AB | %30
 c f2 d | c>A G>G | F3 z || %33  