Craft a musical work based on the specified structure and given theme.
X:1
L:1/8
M:4/4
K:G
['', 'G2 DG B2 GB dBeB dBAB d2', 'dggf g2 dg g2 bg'  
X:1
L:1/8
M:4/4
K:G
 BA |: G2 DG B2 GB | dBeB dBAB | d2 Bd egdB | AGAB GEDE | G2 DG B2 GB | dBeB dBAB | d2 Bd efge | 
 dBAB G2 BA :: dggf g2 dg | g2 bg aged | eaag a2 ea | a2 bg ageg | dggf g2 dg | g2 bg ageg | 
 d2 Bd efge | dBAB G2 BA :|  