Construct melodies utilizing the provided motif and adhere to the outlined musical structure.
X:1
L:1/8
Q:1/4=140
M:4/4
K:Bb
['FB AF (3GAB cd', 'fB Fc cA'  
X:1
L:1/8
Q:1/4=140
M:4/4
K:Bb
|: B2 BA FB AF | (3GAB cd GF Gd | d c2 B BA FA | B3 A FB AF | (3GAB cd eG FA | A B2 c cd cB :: 
 cd eG Gc Bd | dB ef eg B2 | B B2 c dc df |1 fB Fc cA fg | a f2 c d F2 G :|2 fB Fc cA GF | FF F6 |]  