Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/16
M:2/4
K:G
['d2>B2 G2>A2 B2(3(cBA) B2d2 e2(3(fed) g2B2', 'g2ge f2fd e2ed (.B2.d2)']  
X:1
L:1/16
M:2/4
K:G
|: (3(uABc) | d2>B2 G2>A2 | B2(3(cBA) B2d2 | e2(3(fed) g2B2 | AGAB A2(3(ABc) | d2>B2 G2>A2 | 
 B2(3(cBA) B2d2 | e2(3(fed) g2B2 | AGAB G2 :: !fermata!ud2 | g2ge f2fd | e2ed (.B2.d2) | 
 g2ge f2fd | e2ed (.B2.d2) | g2ge f2fd | e2ed (.B2.d2) | e2(3fed g2B2 | AGAB"_D.C." A2 :|  