Generate a piece of music. It is monophony.  
X:1
T:Music21 Fragment
C:Music21
L:1/4
Q:1/4=92
M:2/2
I:linebreak $
K:none
V:1 treble 
V:1
"^Moderato" _E F G _A | _B/c/ _B B2 | _e2 _B G | _B2 F2 | _e e _B G | _B2 F2 | z _E F G | _B3 B | %8
 _E F G _A | _B/c/ _B B2 | _e2 _B G | d2 =A2 | d d _B G | F2 =E2 | z F G c | _B4 | _c _A _c _A | %17
 _c4 | _G _E _G _E | _G4 | F2 _B2 | F/F/ ^F G =F/F/ | ^F G =F/F/ ^F | G4 | G2 c2 | %25
 G/G/ ^G =A =G/G/ | ^G =A =G/G/ ^G | =A4 | _A2 A2 | G F G _A | _B4 | c4 | d ^d =e =d | %33
 ^d =e =d ^d | =e =d =B G- | G2 ^F2 | =F2 _B2 | F/F/ ^F G =F/F/ | ^F G =F/F/ ^F | G4 | _B2 _e2 | %41
 _B/B/ =B c _B/B/ | =B c _B/B/ =B | c4 | F ^F G =F | ^F G =F ^F | G _B d =f- | f4 | _e2 c2 | %49
 _B/=A/ _A G/_G/ F | _E2- E z | z4 | F2 _B2 | F/F/ ^F G =F/F/ | ^F G =F/F/ ^F | G4 | G2 c2 | %57
 G/G/ ^G =A =G/G/ | ^G =A =G/G/ ^G | =A4 | _A2 A2 | G F G _A | _B4 | c4 | d ^d =e =d | %65
 ^d =e =d ^d | =e =d =B G- | G2 ^F2 | =F2 _B2 | F/F/ ^F G =F/F/ | ^F G =F/F/ ^F | G4 | _B2 _e2 | %73
 _B/B/ =B c _B/B/ | =B c _B/B/ =B | c4 | F ^F G =F | ^F G =F ^F | G _B d =f- | f4 | _e2 c2 | %81
 _B/=A/ _A G/_G/ F | _E4- | E2- E z || %84  