Write musical works that keep the predetermined structure and weave in the given motif
X:1
L:1/16
M:2/4
K:Bb
['bfgb fdBc dgfd BDFB', 'cAce g2>f2 dBdf'  
X:1
L:1/16
M:2/4
K:Bb
 (3fga | bfgb fdBc | dgfd BDFB | AFAc BFBd | c=Bcd efga | bfgb fdBc | dgfd BDFB | GABc dgfd | 
 cFAc B2 :: d2 | f2>e2 cAce | g2>f2 dBdf | =edce gbag | afg=e f2g2 | f2>_e2 cAce | g2>f2 dBdf | 
 agfe decd | B2B2B2 :|  