Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
M:6/8
K:Dmix
['def fdf fdf', 'dfB fdf']  
X:1
L:1/8
M:6/8
K:Dmix
 A | def fdf | fdf fed | cde ecA | ecA ecA | def fdf | fdf f2 e | def fef | dBB B2 :: B | dfB fdf | 
 dfB fed | ceA ece | ceA edc | dfB fdf | dfd f2 e | def fef | dBB B2 :|  