Craft a musical work based on the specified structure and given theme.
X:1
L:1/8
M:3/4
K:G
['DG B2 BA GB d2 dB AB', 'AB c2 cA FA'  
X:1
L:1/8
M:3/4
K:G
 DG | B2 BA GB | d2 dB AB | c2 ce dc | (3Bcd g2 DG | B2 BA GB | d2 dB AB | c2 cA FA |1 G4 :|2 
 G3 ggf |: e2 ce ce | d2 dB AB | c2 cA FA | B2 B ggf | e2 ce ce | d2 dB AB | c2 cA FA |1 G3 ggf :|2 
 G4 ||  