Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
Q:1/4=120
M:4/4
K:D
['A3 d (BA)(GF)', '(dc) (BA)(Bc) (de)(fd) |{a} g2{g} f2{f} e3']  
X:1
L:1/8
Q:1/4=120
M:4/4
K:D
 (F>G) | A3 d (BA)(GF) |({EF} GF)(ED) A3 A | (Bc)(de) (fd)(gf) | e4 E2 (FG) | A3 d (BA)(GF) | 
({EF} GF)(ED) A3 F | G2 (AB) A2 (ce) | d4 D2 || (dc) | (BA)(Bc) (de)(fd) |{a} g2{g} f2{f} e3 E | 
 F2 A2 (d>e)(fg) |{f} e4 E2 (FG) | A3 d (BA)(GF) |({EF} GF)(ED) A2 (GF) | (GB)(Ad) (c/d/e) (Ac) | 
 d4 D2 |]  