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
['D2 GA B2 B2 (3ABA GA B<d', 'dBGg gfga baga agab a2 ef gfga']  
X:1
L:1/8
M:4/4
K:G
 D2 GA B2 B2 | (3ABA GA B<d dg | e<d ge dBGB | A<G BG A<G EG | D2 GA B2 B2 | (3ABA GA B<d dg | 
 e<d ge dBGB |1 AGEF G2 FE :|2 AGEF G2 Gg || gfga bage | d^cde dBGg | gfga baga | agab a2 ef | 
 gfga bage | dcde d2 ef | g2 (3fgf (3efe dB | c2 (3BcB A2 (3GFE ||  