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:A
['AGAc ecAc dcdf ecAc', 'aece fece']  
X:1
L:1/8
M:4/4
K:A
 (3EFG | AGAc ecAc | dcdf ecAc | d2 fd c2 ec | BABc BdcB | AGAc ecAc | dcdf ecAc | eagf edcB | 
 c2 A2 A2 :: (3efg | aece fece | aece fece | d2 bd c2 ac | BABc BdcB | AGAc ecAc | dcdf ecAc | 
 eagf edcB | c2 A2 A2 :|  