Produce music using the specified musical structure depicted in letters along with the provided musical theme.
X:1
L:1/8
M:6/8
K:D
['d2 A', 'A2 D']  
X:1
L:1/8
M:6/8
K:D
 ABc d2 A | AGF E2 D | D2 d d2 A | B3 d2 A | ABc d2 A | AGF E2 D | =cBc E2 F | G3 =c2 :: 
 [FA]EF d2 A | [FA]EF A2 D | [FA][EG]F A2 D | G3 =c2 G | [FA][EG]F A2 D | DDD D2 =c | =cBc E2 F | 
 G3 =c3 :|  