Generate a piece of music. It is monophony.  
X:1
T:Music21 Fragment
C:Music21
L:1/4
Q:1/4=92
M:4/4
I:linebreak $
K:none
V:1 treble 
V:1
"^Moderato" ^F | A A/A/- A/A/ A | A A2 =c | A A/A/- A/A/ A | A A2 ^c | A A/A/- A/B/ G | ^F F2 ^c | %7
 E3 B | D/ D3/2- D ^F | A A/A/- A/A/ A | A A2 B | ^c c/c/- c/c/ c | ^c c3 | z B B3/2 A/ | B B B2 | %15
 z B B3/2 A/ | B B B ^c | A4 | ^G/B/ A =G E | D4- | D2 z E | ^F2 E D | d d B3/2 G/ | %23
 A/ A G/ A G/A/- | A/ A G/ A B | D4 | ^d e _B =B | ^F2 E =D | d d B3/2 G/ | A/ A G/ A G/A/- | %30
 A/ A G/ A B | d4 | _B =B e/e/ e | z d B/ G E/ | G3 G | d =B G E | G G2 G | d =B G E | %38
 G2- G/ A G/ | B B- B/ A G/ | c2 d2 | ^F2 E D | d d B2 | A G A B | e3 B/B/ | D/ d G/ A G/d/- | %46
 d/ d G/ A A | G4- | G z z E | ^F2 E D | d d B3/2 G/ | A/ A G/ A G/A/- | A/ A G/ A B | D4 | %54
 ^d e _B =B | ^F2 E =D | d d B3/2 G/ | A/ A G/ A G/A/- | A/ A G/ A B | d4 | _B =B e/e/ e | %61
 z d B/ G E/ | G3 G | d =B G E | G G2 G | d =B G E | G2- G/ A G/ | B B- B/ A G/ | c2 d2 | ^F2 E D | %70
 d d B2 | A G A B | e3 B/B/ | D/ d G/ A G/d/- | d/ d G/ A A | G4- | G2 z2 || %77  