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:D
['BE E2 BAGA BEED G3 A B2', 'GA B2 eBfBeB B2 ed BAGA |1']  
X:1
L:1/8
M:4/4
K:D
|: BE E2 BAGA | BEED G3 A | B2 BA Bcde | gedB A2 GA :: B2 eBfBeB | B2 ed BAGA |1 B2 eB g2 gb | 
 aged B2 GA :|2 B2 de g2 af | gedB A2 GA ||  