Produce music using the specified musical structure depicted in letters along with the provided musical theme.
X:1
L:1/8
M:4/4
K:Gdor
['B2 GA', 'B2 fB']  
X:1
L:1/8
M:4/4
K:Gdor
 A | B2 GA Bcdc | BDGB AFFA | B2 GA Bcdg | fdcB AFFA | B2 GA Bcdc | BDGB AFFA | B2 GA Bcde | 
 fdcB AFFA |: B2 fB gBfB | B2 fB cAFA | B2 fB gBfB | cAFA BGGA | B2 fB gBfB | B2 fB cAFA | 
 GBdg abag | fdcB AFFA :|  