Craft a musical arrangement that integrates the provided motif and upholds the required musical structure.
X:1
L:1/8
M:6/8
K:Bb
['B>cB F>DF', 'f>gf dbd'  
X:1
L:1/8
M:6/8
K:Bb
 B>cB F>DF | B>cB F>DF | B>FB d>Bd | f3 F3 :: f>gf dbd | cac BgB | f>gf dbd |"^tr" d3 c3 | 
 f>gf dbd | cac AGF | ddB ccA | B3 B,3 :|  