Assemble a musical composition that combines the featured motif and conforms to the defined alphabetical form.
X:1
L:1/8
Q:1/2=80
M:2/2
K:Bb
['B2 bg fdcB', 'BGFE DEFD']  
X:1
L:1/8
Q:1/2=80
M:2/2
K:Bb
 B2 bg fdcB | AFcF dFcF | B2 bg fdcB | FBAc | dB B2 :: BGFE DEFD | ECCc AFGA | BGFE DEFD | 
 B,BAc dB B2 :|  