Compose a piece using the alphabetic notation of the assigned musical structure and the provided melodic motif.
X:1
L:1/8
M:2/2
K:Amix
['a4 a2', 'B3 c']  
X:1
L:1/8
M:2/2
K:Amix
 e | a4 a2 f2 | efec A2 e2 | a4 a2 e2 | f3 a f2 e2 | a4 a2 f2 | efed cBAB | cBcd edcA | B3 c B3 :| 
 e | B3 c B2 AB | cA B2 A2 Bc | BABA c2 e2 | f3 a f4 | e2 a2 a2 f2 | efec A2 B2 | cBcd e2 c2 | 
 B3 c B3 :|  