Craft a musical work based on the specified structure and given theme.
X:1
L:1/8
M:4/4
K:G
['B B2 A', 'd2 (3Bcd efge'  
X:1
L:1/8
M:4/4
K:G
|: B B2 A BAGA | B2 GB AGEG |1 B B2 A BAGB | cABG AGEG :|2 Bdeg edBG | AcBG AGEG |: DG G2 DGBG | 
 DGBG AGEG | DGGF GABc |1 d2 BG AGEG :|2 dBAc BG G2 |: d2 (3Bcd efge | dGBG AGEG | d2 (3Bcd efge |1 
 a a2 b ageg :|2 a a2 b aged ||  