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:D
['.A(dcd) .A(dcd)', '(de).d.c (BA).G.F FAdA']  
X:1
L:1/8
M:4/4
K:D
 d | .A(dcd) .A(dcd) | (fd)ad bdad | .A(dcd) .A(dcd) | f2 e2 e4 | .A(dcd) .A(dcd) | (fd)ad bdad | 
 (Ad).c.e (db).a.g | f2 d2 d2 :: f | (ab)ag (fg).f.e | (de).d.c (BA).G.F | FAdA FGAF | G2 E2 E3 g | 
 (ab)ag (fg)fe | (de).d.c (BA).G.F | FAdA Gbag | f2 d2 d2 |]  