Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:4/4
K:Amix
['ABcd eagc d2 fd gBdB', 'ea a2']  
X:1
L:1/8
M:4/4
K:Amix
|: ABcd eA A/A/A | ABcd eagc | d2 fd gBdB | BAeA fAe^g | aA A/A/A ABcA | ABcd eagc | d2 fd gBdB |1 
 BAeA A3 E :|2 BAeA A2 cd |: ea a2 eA B/c/d | BGdB gBcd | ea a2 efga | ecdB ABcd | ea a2 eA B/c/d | 
 BGdB gBdB | BAeA fAed |1 cAeA A2 cd :|2 cAeA A3 E ||  