Produce music using the specified musical structure depicted in letters along with the provided musical theme.
X:1
L:1/8
M:3/4
K:G
['ba g3 f ed c3 B A>F', 'G3 D GB']  
X:1
L:1/8
M:3/4
K:G
 g | ba g3 f | ed c3 B | A>F DF A>c | (3BdB G>B d>g | ba g3 f | ed c3 B | A>F DF A>c | (3BdB G3 :: 
 D | GB d2 BG | F2 F3 D | FA c3 B | G2 G3 D | GB d3 c | e>d cB c>B | A>g f<d f>a | a<f g3 :|  