Generate a piece of music. It is monophony.  
X:1
T:Music21 Fragment
C:Music21
L:1/8
Q:1/4=78
M:6/8
I:linebreak $
K:Eb
V:1 treble 
V:1
 B | EBG GBE | F E2 z2 B | BcB edc | B4 z B | EBG GBE | F E2 z2 G | FGF edc | d4 z c | BcB fed | %10
 e B2 z2 G | GFE EFG | F4 z c/B/ | BcB fed | e B2 z2 c | BAG AGF | E4 z B | EBG GBE | %18
 F E2 !fermata!c2 B | BcB Bcd | e E2 z x2 || %21  