Develop a musical composition utilizing the presented motif and adhering to the required structure.
X:1
L:1/8
Q:3/8=115
M:6/8
K:Bb
['B2 B (BF).D f2 f (fd).B B2', 'b2 b'  
X:1
L:1/8
Q:3/8=115
M:6/8
K:Bb
 B2 B (BF).D | f2 f (fd).B | B2 c{e} (d^c).d | G2 A"^No rest in book" B2 z :: (Bd).f b2 b | 
 (ag).f (gf).d | Bdf b2 b | (ag).f g2 a | b2 b (af)d | g2 g (fd).B | B2 c{e} (d^c).d | G2 A B2 z :|  