Build a series of chord progressions that fit well with the existing melody.
|: (3f/g/a/ | b d d d | B d d d | f e/d/ e | g f/=e/ f | b d d d | B d d d | 
 f e/d/ e/f/ | d2 :: d | d c/=B/ c2 | e d/^c/ d2 | f e/d/ e/f/ | 
 g f/e/ (3f/g/a/ | b d d d | B d d d |1 f e/d/ e/f/ | d2 :|2 f =e/f/ g/a/ | 
 b2 |]  
X:1
L:1/4
M:43/44
K:Bb
|: (3f/g/a/ |"Bb" b d d d | B d d d |"F7" f e/d/ e |"Bb" g f/=e/ f |"Bb" b d d d | B d d d | 
"F7" f e/d/ e/f/ |"Bb" d2 :: d |"F7" d c/=B/ c2 |"Bb" e d/^c/ d2 |"F7" f e/d/ e/f/ | 
"Bb" g f/e/ (3f/g/a/ |"Bb" b d d d | B d d d |1"F7" f e/d/ e/f/ |"Bb" d2 :|2"F7" f =e/f/ g/a/ | 
"Bb" b2 |]  