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:G
['BGGG ABce dggg agfe', 'DGGB cBAG FGAB cedc BGGB cBAG FGAF']  
X:1
L:1/8
M:4/4
K:G
 BGGG ABce | dggg agfe | dggg fgab | c'bag fedc | BGGG ABce | dggg agfe | dggf dedc |1 
 BG (3AcA G3 A :|2 BG (3AcA G3 B |: cBAG FGAF | DGGF DGGB | cBAG FGAB | cedc BGGB | cBAG FGAF | 
 DGGG AGFE | DGGF DEDc | BGAF G4 :|  