Compose melodies adhering to the given motif and the outlined musical structure.
X:1
L:1/8
M:4/4
K:Bb
['f f2']  
X:1
L:1/8
M:4/4
K:Bb
 f f f2 b c' f'2 | f' d' c' b c' f' c' b | b f f2 f b b2 | f b d c B4 | f d c B c f f2 | 
 f d c B c d c2 | f f f2 b c' f' d' | c' f' c' b f4 |]  