Develop a musical arrangement using the specified sequence in alphabetic representation and the provided motif.
X:1
L:1/4
M:3/2
K:Bb
['d e', 'e f']  
X:1
L:1/4
M:3/2
K:Bb
 d | e f2 B2 b | a g2 f2 b | d e f g e d/>c/ | c2 B B2 :: f | b a g d e f | f g _a g2 c' | 
 g a2 =e c a | g2 f f2 b | f g2 d2 e | f B2 A2 f | d g f g a b | b2 a b2 |]  