Produce music using the specified musical structure depicted in letters along with the provided musical theme.
X:1
L:1/8
Q:1/2=100
M:4/4
K:G
['G2 dc B2 AG', 'gabg efge', 'd4 d2 cB caaa c2 BA Bggg']  
X:1
L:1/8
Q:1/2=100
M:4/4
K:G
 G2 dc B2 AG | FGAB A2 D2 | G2 dc B2 AG | FGAB A4 :: gabg efge | fgaf d2 d2 | gabg efge | 
 face d4 :: d2 cB caaa | c2 BA Bggg | B2 AG ABcA | BdFA G4 :|  