Create a musical composition following the given structure and adhering to the genre norms.
Only One Section  
X:1
L:1/8
M:2/4
K:Bb
 d'2 d' f' | b2 c' d' | c' b g f | d4 | d'2 d' f' | b2 c' d' | c' b g2 | f4 |]  