Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:12/8
K:Amix
['E2 A', 'A ABA']  
X:1
L:1/8
M:12/8
K:Amix
|: E2 A ABA E2 A ABA | e2 A ABA G2 A F2 A | E2 A ABA E2 A ABd | efe dcB A3 A3 :: efe edc d3 c2 d | 
 e2 A ABA G2 A F2 A | E2 A ABA E2 A ABd | efe dcB A3 A3 :|  