Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:3/4
K:G
['d2 d2']  
X:1
L:1/8
M:3/4
K:G
 _Bc d4 | d2 d2 d2 | dd c4 | c2 _BA G2 | BB A3 F | G2 _BABc | dd c3 A | c2 _BA G2 |]  