Generate music with the following musical form in terms and the given motif.
X:1
L:1/8
M:2/4
K:Bb
['B2 cd efga', 'Acec Bbab'  
X:1
L:1/8
M:2/4
K:Bb
|: B2 cd | efga | bfdB |{B} A2 GF | B2 cd | efga | bg=eg | f2 F2 :: Acec | Bbab | Acec | Bbab | 
 Acec | Bbab | deAc | B2 B,2 :|  