Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:4/4
K:A
['A<A e<A af e<e', 'cA E<E']  
X:1
L:1/8
M:4/4
K:A
 e | A<A e<A af e<e | fe ae f<B B2 |{/c} A<A e<A af e<e |{/g} fe a<c B2 A :| e | A<A cA eA cA | 
 E<E GE [EB]E G[EB] | A<A cA eA cA | E<E GB A2 A2 |{c} A<A cA aecA | E<E (GE) ([EB]E) (G[EB]) | 
 (3ABc (3Bcd (3cde (3def | (3agf (3efg a2 a |]  