Generate a piece of music. It is monophony.  
X:1
T:Music21 Fragment
C:Music21
L:1/8
Q:1/4=80
M:2/4
I:linebreak $
K:C
V:1 treble 
V:1
 C | CD EF | Ge c>A | GE EC | ED DE/D/ | CD EF | Ge c>A | GE DE | C4 | ee de | c3 c | AF cA | %12
 G3 E | CD EF | Ge !fermata!c z/ A/ | GE DE | C4 | z4 | z4 | z3 C | CD EF | Ge c>A | GE EC | %23
 ED DE/D/ | CD EF | Ge c>A | GE DE | C4 | ee de | c3 c | AF cA | G3 E | CD EF | %33
 Ge !fermata!c z/ A/ | GE DE | C4 || %36  