Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/4
M:2/2
K:Amin
['e3/2 B A']  
X:1
L:1/4
M:2/2
K:Amin
|:"Am" A A a2 |"C" g e g2 |"Em" e3/2 d/"D" B A |"G" G A B G |"Am" A A a2 |"C" g e g2 | 
"Em" e3/2 d/ B e |"Am" A2 A2 ::"Am" e3/2 d/"D" B A |"G" G A B G |"Am" e3/2 d/"D" B A |"G" B2 d2 | 
"Am" e3/2 d/"D" B A |"G" G A B G |"Em" e3/2 d/ B e |"Am" A2 A2 :|  