Craft a musical arrangement that integrates the provided motif and upholds the required musical structure.
X:1
L:1/8
Q:1/2=90
M:2/2
K:Bb
['(BA) B2 (FE) DBFB GABc BAGF GABc', 'B2 ga bfdB bfdB fdcd BAGF ecec'  
X:1
L:1/8
Q:1/2=90
M:2/2
K:Bb
 (BA) | B2 (FE) DBFB | GABc BAGF | GABc dBfB | bBfB BAGF | BGFE DBFB | GBFB EBDB | DFBd EGce | 
 dBcA B2 :: ga | bfdB bfdB | fdcd BAGF | ecec dBdB | A2 F2 F2 (B_A) | GBEB edcB | AFAc fedc | 
 Bbab fdBf | d2 B2 B2 :|  