Create a piece of music utilizing the given motif and adhering to the specified structure.
X:1
L:1/8
M:2/4
K:Amin
['AB cd', 'ef ec A/B/c/d/ ec Bd cB'  
X:1
L:1/8
M:2/4
K:Amin
|: AB cd | ec Ac | Bd cB | AB cd | AB cd | ec Ac | Bd cB | A2 A2 :: ef ec | A/B/c/d/ ec | Bd cB | 
 AB cd | ef ec | A/B/c/d/ ec | Bd cB | A2 A2 :|  