Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:3/8
K:A
['B>cB B>cB']  
X:1
L:1/8
M:3/8
K:A
 EAA | G>FE | dBG | BA z | EAA | G>FE | dBG | A2 z | B>cB | B>cB | B>cB | B>cB | AGF | E e2 | dBG | 
 A2 z |]  