Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:6/8
K:Dmix
['A2 D FED A2 B cAF', 'd2 e fed e2 d cAF']  
X:1
L:1/8
M:6/8
K:Dmix
|: A2 D FED | A2 B cAF | G2 E EDE | c2 d cAG | A2 D FED | A2 B cAF | GEE cEE | DED D2 :: A | 
 d2 e fed | e2 d cAF | G2 E EDE | c2 d cAG | d2 e fed | e2 d cAF | GEE cEE | DED D2 :|  