Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:4/4
K:Dmix
['d>ef(d cA)A>c', 'D G A>BAG A(BcA) G>(AGF) EFGE A>BA(G', '(D G) A>BAG A(BcA) G>(AGF) EFGE A>BAG']  
X:1
L:1/8
M:4/4
K:Dmix
 A | d>ef(d cA)A>c | BGG(A/B/) cAA>c | d>ef(d cA)A>c | BG(AF) D2 D :| G | A>BAG A(BcA) | 
 G>(AGF) EFGE | A>BA(G ABc)d | c(AGE) D2 (D || G) | A>BAG A(BcA) | G>(AGF) EFGE | A>BAG AddB | 
 c(AGE) D2 D |]  