Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:2/2
K:D
['A2 dcdA Bcde gfed cBAG FAdf gfed', 'd2 fg agfe defg bagf e2 ed']  
X:1
L:1/8
M:2/2
K:D
 A2 | dcdA Bcde | gfed cBAG | FAdf gfed | cedB A2 Bc | dAeA fAgA | agfe dcBA | dfeg faeg | 
 f2 d2 d2 :: fg | agfe defg | bagf e2 ed | cAeA gfed | cedB A2 Bc | dAeA fAgA | agfe dcBA | 
 Bdce dfeg | f2 d2 d2 :|  