Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:6/8
K:Dmin
['faf ece ege fdf', 'f/g/af g/a/bg']  
X:1
L:1/8
M:6/8
K:Dmin
 fcf faf | ece ege | fdf faf | a3 d3 | fdf faf | ece ege | fdf e^cA | dAF D3 :: f/g/af g/a/bg | 
 afd e^cA | f/g/af g/a/bg | a3 d3 | f/g/af g/a/bg | afd e^cA | fdf e^cA | eAF D3 :|  