Develop a musical piece using the given motif and adhere to the outlined structure.
X:1
L:1/4
M:4/4
K:Bb
['B B/B/']  
X:1
L:1/4
M:4/4
K:Bb
 F | B B/B/ B B/c/ | d B G G | c c F A | c B2 F | B B/B/ B B/c/ | d B G G | c c F A | c B2 d/d/ | 
 f/f/ e/e/ d d | f/f/ e/e/ d B | B B/B/ B/B/ A/B/ | e d c d/e/ | f/f/ d B A | G G f d/c/ | 
 B B/B/ A A | c B2 |]  