Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:6/8
K:D
['f/g/ afd gec d3 dcB', 'A d2 A', 'G2 G BGE E2 G', 'D2 A AFA AFA BGB G2 B']  
X:1
L:1/8
M:6/8
K:D
 f/g/ | afd gec | d3 dcB | AGF EFG | FEF D2 f/g/ | afd gec | d3 dcB | edc BAG | A3 A2 :: A | 
 d2 A d2 A | BAB G2 B | e2 B e2 B | cBc A2 d | f2 d f2 d | g3 gab | afd gec | d3 d2 :: A | 
 cAF G2 G | BGE E2 G | FGA AGF | F3 E2 A | dAF G2 G | BGE E2 G | FBA GFE | D3 D2 :: A | AFA AFA | 
 BGB G2 B | BGB BGB | cBc A2 d | fdf fdf | g3 gab | afd gec | d3 d2 :|  