Generate a musical piece using the presented motif and follow the alphabetical structure provided.
X:1
L:1/8
M:4/4
K:D
['BAGB ADFA', 'ADFA BAGB']  
X:1
L:1/8
M:4/4
K:D
 D2 FA D2 cd | BAGB ADFA | BAGB ADFA | BAGF EGFE | D2 FA D2 cd | BAGB ADFA | BAGB ABdf | 
 afeg fdde :| f2 df efde | fedB ADFA | BAGB ADFA | BAGB EGFE | f2 df efde | fedB ADFA | BAGB ABdf | 
 afeg fd e2 :|  