Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:9/8
K:A
['B2 A', 'z BA', 'z3 cAF EFc A']  
X:1
L:1/8
M:9/8
K:A
|: E2 A ABc B2 A | AEA ABc BAE | F2 B Bce B2 A | Bce f2 c BAF | E2 A ABc B2 A | AEA ABc BAE | 
 DEF Adc e z g |1 aec BAG A z2 :|2 aec BAG A (3BBA || F3 ABc z BA | EEE FAc z BA | 
 DDD EF(A A) (3FED | EEE EFA BAE | FFF ABc z BA | EEE FAc z BA | DEF Adc e z g | aec BAG A (3BBA | 
 F3 ABc z BA | EEE FAc z BA | DDD EF(A A) (3FED | EEE EFA BAE | FFF ABc z BA | EEE FFF AAA | 
 BBB ccc ddd | ef(a a)fe BAF || DEF Adc (e3 | (e3) e) z2 z3 | cAF EFc A z2 ||  