Compose a piece of music using the specified letter-based musical form and incorporating the assigned motif.
X:1
L:1/8
M:4/4
K:Bmin
['', 'dBBA FBBc dBfB gfed', 'dBBA B3']  
X:1
L:1/8
M:4/4
K:Bmin
 Bc |: dBBA FBBc | dBfB gfed | cdc^A FAcF | ^Acfg fedc | dBBA FBBc | dBfB gfed | cdcF ^Acfe |1 
 dBBA B3 c :|2 dBBA B3 f |: fBdf bagf | ecef agfe | fBdf gfed |1 cdcB ^A3 f | fBdf bagf | 
 ecef agfe | fgfd edce | dBBA B3 f :|2 cdcB ^Acfe | dBBA FBBc | dBfB gfed | cdcF ^Acfe | 
 dBBA B3 c ||  