Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:3/4
K:D
['A2 FAFA B2 GBGB e2', 'd6 (Adf)dfd Adfdfd Adfdfa ag [Ae]4 Acecec', 'aA^gAaA dfaAgA e2', 'AgfA d2 defg', '', 'A2 dfa^gaf =gbgfge f4 A2 dfagaf gbgfge']  
X:1
L:1/8
M:3/4
K:D
 A2 FAFA | B2 GBGB | e2 cece | f2 dfdf | A2 FAFA | B2 GBGB | e2 cece | d6 :: (Adf)dfd | Adfdfd | 
 Adfdfa | ag [Ae]4 | Acecec | Acecec | Aceceg |1 gf d4 :|2 gf d2 |: df | aA^gAaA | dfaAgA | 
 e2 ^cAf^c | d2 defg | aA^gAaA | dfaAgA | e2 ^cAfA | d4 :: fg | e2 AgfA | d2 defg | e2 AgfA | 
 d2 defg | aA^gAaA | dfaAgA | e2 cefA |"^da capo" d4 :|[K:D]"^Coda" |: A2 | FAdcdf | gecAcA | 
 d4 A2 | dfa^gaf | =gbgfge | f4 A2 | dfagaf | gbgfge | cegfge | fafefd | FAdcdf | gecAcA | d4 :|  