Craft a musical work based on the specified structure and given theme.
X:1
L:1/8
M:6/8
K:D
['GBB FBB']  
X:1
L:1/8
M:6/8
K:D
|: B | GBB FBB | EBB BAB | GBB FBB | BAG E2 B | GBB FBB | EBB BAB | dBd BAG | FAG E2 :|  