Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
Q:1/4=150
M:4/4
K:Amin
['A2 z']  
X:1
L:1/8
Q:1/4=150
M:4/4
K:Amin
|:"Am" z A2 A EE A2 |"Dm" z B2 d"Am"cB A2 | z e2 e"Dm" f>e df |"Am" e>d ef e4 :|  