Compose a piece of music based on the provided motif and adhering to the outlined musical structure.
X:1
L:1/4
M:4/4
K:Bb
['F F']  
X:1
L:1/4
M:4/4
K:Bb
 B | d/d/ B F/F/ B | c/c/ c c c | d A B/B/ G | G F F z | G G G B/G/ | F F F F | B B d/c/ B | 
 F F B |]  