Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:4/4
K:A
['E2 A2 AA A3 c cBBB B3']  
X:1
L:1/8
M:4/4
K:A
 E2 | A2 AA A3 c | cBBB B3 d | cBcdfeee | eddd c2 z e | eccc d3 d | dBBB c3 E | FFGG A2 BB | 
 ccdG A2 |]  