Craft a musical work based on the specified structure and given theme.
X:1
L:1/8
M:4/4
K:G
['Bcde fBAB gBaB bBAB GBFB EBDB', 'B2 de fBAB gBAB gaba g^fgd g^fgd'  
X:1
L:1/8
M:4/4
K:G
 F2 | Bcde fBAB | gBaB bBAB | GBFB EBDB | GecA BAGF | Bcde fBAB | gBaB bBAB | GBFB EBDB | 
 GecA B2 :: de | fBAB gBAB | gaba g^fgd | g^fgd edeB | cdec BAGF | Bcde fBAB | gBaB bBAB | 
 GBFB EBDB | GecA B2 :|  