Develop musical pieces that conform to the specified format and include the suggested musical theme.
X:1
L:1/8
M:2/4
K:Bb
['b g/']  
X:1
L:1/8
M:2/4
K:Bb
 b c' f' d' | c'4 | f' c' b g | f4 | b b2 d | d' c' d'2 | f' d'/ c'/ b g/ b/ | c'4 | 
 c'3/2 b/ c' f' | b a/ g/ f2 | b g/ f/ d c/ d/ | f4 | c' d' b g | f'4 | b g/ f/ d c/ d/ | f4 |]  