Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:4/4
K:Gmin
['d BdGe d g2 d cBAG ^F/G/A/F/', 'B3 d =BdG=f ed/c/ z d ce/d/']  
X:1
L:1/8
M:4/4
K:Gmin
 d | BdGe d g2 d | cBAG ^F/G/A/F/ D=f | dfcf BfAF | GBcA B3 :: d | =BdG=f ed/c/ z d | 
 ce/d/ c/B/A/G/ ^F3 d | ge d^f gedc | BA/G/ D^F G3 :|  