Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
Q:1/4=200
M:2/2
K:D
['AD (3FED', '', 'FAEA D2']  
X:1
L:1/8
Q:1/4=200
M:2/2
K:D
|: AD (3FED AD (3FED | Adcd fedc | BE E2 BE E2 | Beed cdeg | fB B2 fB B2 | fgfe dfag | fdec dBAG |1 
 FAEA D2 dB :| FAEA D2 fg |]: afdg bgeg | fdcd BAFG | Addc defg | (3aba gb a2 fg | a3 f g3 e | 
 f3 e dfag | fdec dBAG |1 FAEA D2 fg :|2 FAEA D2 z2 |]  