Produce music using the specified musical structure depicted in letters along with the provided musical theme.
X:1
L:1/8
M:2/4
K:G
['B2 G2', 'G4 EGdB FAdB GBed cBAG EGcA FAdc']  
X:1
L:1/8
M:2/4
K:G
 d2 d2 | B2 G2 | AGAd | B2 G2 | d2 d2 | B2 G2 | AGAd | G4 :: EGdB | FAdB | GBed | cBAG | EGcA | 
 FAdc | BgAf | g2 g2 :|  