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:C
['Td3 e dBgB', 'dgbg agbg']  
X:1
L:1/8
M:4/4
K:C
 |[M:2/2][K:G] (3:2:1TB | Td3 e dBgB | dBgB aAAB | Td3 e dBgB | AcBA BGGB | Bdde dBgB | dBgB aAAc | 
 Bdde dBgB | AcBA BGG || B | dgbg agbg | dgbg ageg | dgbg agbg | dedc BGGE | DGBG AGBG | 
 DGBG AGEG | BAGF GFED | EFGA BGG |]  