Develop a musical composition utilizing the presented motif and adhering to the required structure.
X:1
L:1/8
Q:1/4=90
M:6/8
K:Bb
['A B2']  
X:1
L:1/8
Q:1/4=90
M:6/8
K:Bb
 F | G2 A B2 F | G2 A B2 c | d2 c d2 c | B2 c c2 c/ c/ | e3/2 e/ e d3/2 c/ c | B B A B2 c | 
 (d2 c d2) =e | (f3 f2) F | (f3 f2) F | (f3 f2) F | G2 G A2 A | B2 c e2 d | (c6 | B3 B2) |]  