Design musical compositions that conform to the indicated framework and encompass the proposed musical concept.
X:1
L:1/8
M:4/4
K:Bb
["b c'"]  
X:1
L:1/8
M:4/4
K:Bb
 b2 b d f4 | b c' f' c' b4 | b c' f'2 f' d' c' b | b a g d f4 | c' f' g b c' f' d' c' | 
 b2 c' g f2 f d | c'2 b c' f' c' b a | g f/ g/ f c B4 | g f/ g/ c d f2 f d | c' c' b c' f' c' b a | 
 g f/ g/ f c B4 |]  