Craft a musical work based on the specified structure and given theme.
X:1
L:1/16
Q:1/8=220
M:2/4
K:G
['B2G2 B2G2', 'FGA2 G2B2'  
X:1
L:1/16
Q:1/8=220
M:2/4
K:G
 B2G2 B2G2 | cBcA d4 | B2G2 B2G2 | AGAF G4 :| FGA2 G2B2 | ABc2 B2d2 | FGA2 G2B2 | ABcA G4 | 
 FGA2 G2B2 | ABc2 Bcd2 | GABG ABcA | BGAF G4 ||  