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:D
['(A/B/c)A- AFE', 'd2 B (A/B/c)d e2 d (e/f/e)(d c)BA']  
X:1
L:1/8
M:6/8
K:D
 B | (A/B/c)A- AFE | TF3 FED | (A/B/c)A- AFA | DFA dcB | (A/B/c)A- AFE | FGF FEF | DED FE(F | 
 D)FA d2 :: B | (A/B/c)d e2 d | (e/f/e)(d c)BA | (A/B/c)d [ce]2 (f | g)fe d2 A | def gfe | 
 ded dcB | (A/B/c)A- AFA | (DF)A d2 :|  