Construct a piece of music using the designated motif as the basis, while ensuring the required form is followed.
X:1
L:1/8
M:4/4
K:Bmin
['f2 bf afec', 'fabf a2 fa fece'  
X:1
L:1/8
M:4/4
K:Bmin
|: dBBA Bcde | f2 bf afec | dBBA BcdB | A2 FA B2 B2 | dBBA Bcde | f2 bf afec | f2 bf afec | 
 dBBA B2 B2 :: fabf a2 fa | fece fece | fabf a2 fa | fece f2 f2 | fabf a2 fa | fece fece | 
 fabf afec | dBBA B2 B2 :|  