Compose music by following the designated structure and integrating the suggested musical idea.
X:1
L:1/8
M:2/4
K:Bb
['(3g/ f/ =e/']  
X:1
L:1/8
M:2/4
K:Bb
 c'2 g2 | f3 (3g/ f/ =e/ | f4 | f2 =e2 | f'2 c'2 | g3 (3g/ f/ =e/ | f4 | f' f'2 d' | c' c'2 g | 
 f2 c'2 | g3 (3g/ f/ =e/ | g g2 f/ d/ | d c3 | g2 f d | c4 | f =e f g | c' b/ g/ f =e | 
 g f2 f/ d/ | d c2 B | g2 f d | c4 |]  