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:Dmin
['D2 AG EG G2', 'ed cAGE F3 G']  
X:1
L:1/8
M:4/4
K:Dmin
|: D2 AG EG G2 | A2 GA cAGE | D2 AG EG G2 |1 A2 GE EDCE :|2 A2 GE ED D2 || EGA=B c2 BG | 
 Adde f2 ed | cAGE F3 G | AcGE ED D2 | EGA=B cEGc | ^FAde =f2 ed | cAGE F3 G | A/B/c =B/c/d cAGE ||  