Generate a piece of music. The title is The traditional tunes of the Child ballads.  
X:1
T:Music21 Fragment
L:1/8
M:4/4
I:linebreak $
K:none
V:1 treble 
V:1
 D2 | A>_B A>G F2 E2 | D4 z2 c2 | d2 ef A2 C2 | d6 c2 | de fd c2 d2 | F6 GG | Ad AG F2 E2 | %8
 D6 x2 || %9  