Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:2/4
K:A
['Aaec dBAG', 'CECE DFDF']  
X:1
L:1/8
M:2/4
K:A
 Aaec | dBAG | AcBA | GFEG | Aaec | dBAG | cBAG | A2 A,2 :: CECE | DFDF | GBGE | AFED | CECE | 
 DFDF | cedB | A2 C2 :|  