Compose a music piece that includes the specified motif while adhering to the outlined alphabetical sequence.
X:1
L:1/16
M:2/4
K:A
['ABcd efec eaec efec dedB cdcA', 'aAce aece']  
X:1
L:1/16
M:2/4
K:A
|: ABcd efec | eaec efec | dedB cdcA | FBBA GBBc | ABcd efec | eaec efec | dedB cdcA | 
 FBAG A2 z2 :: aAce aece | aAgA fAeA | dedB cdcA | FBBA GBBc | aAce aece | fdBf ecAc | dedB cdcA | 
 FBAG A2 z2 :|  