Generate a piece of music.  
X:1
T:Music21 Fragment
C:Music21
L:1/4
M:none
I:linebreak $
K:none
V:1 treble 
V:1
{/^F} G G c c | c2 c c | !turn!c2 B G | G G c B || C C E F | G G B c | e/ d/ c/ B/ A/ G/ F/ E/ | %7
 F/ G/ F/ E/ D/ C/ B/ c/ || %8  