Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
M:3/4
K:A
['Ac A2 c2']  
X:1
L:1/8
M:3/4
K:A
 Ace=gfe | fz/c/dcdf | Az/c/e=gfe | fz/d/cB A2 | Ac A2 c2 | BcdcdB | Ac A2 c2 | BB G2 E2 |]  