Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/8
M:4/4
K:Bdor
['Bfef BB b2 FBBd cAec Bfef Bbba', 'dB B/B/B FBdB c2']  
X:1
L:1/8
M:4/4
K:Bdor
 Bfef BB b2 | FBBd cAec | Bfef Bbba | g2 e/f/g afec | Bfef BB b2 | FBBd cAec | Bfef Bbba | 
 g2 e/f/g afec || dB B/B/B FBdB | c2 AB cdec | dB B/B/B FBdB | c2 e/f/g afec | dB B/B/B FBdB | 
 c2 AB cdec | Bfef Bbba | g2 e/f/g afec ||  