Construct chordal sequences to boost the harmonious coherence within the specified musical piece.
f c d | b2 a | g B c | d/f/ a/g/ f/e/ | f c d | b2 a | g B c | d d z :: 
 g/>f/ g/>f/ e | f/>e/ f/>e/ d | e B c | d/f/ f/b/ a | g/>f/ g/>f/ e | 
 f/>e/ f/>e/ d | e B c | d d z ::[K:G] d/b/ ^a/b/ c'/b/ | b a a | c' f f | 
 a g g | d/b/ ^a/b/ c'/b/ | b a a | c' f f | g g z :|  
X:1
L:1/4
M:3/4
K:D
"D" f c d | b2 a |"A7" g B c |"D" d/f/ a/g/ f/e/ | f c d | b2 a |"G" g B"A7" c |"D" d d z :: 
"A7" g/>f/ g/>f/ e |"D" f/>e/ f/>e/ d |"A7" e B c |"D" d/f/ f/b/ a |"G" g/>f/ g/>f/ e | 
"D" f/>e/ f/>e/ d |"A7" e B c |"D" d d z ::[K:G]"G" d/b/ ^a/b/ c'/b/ |"A7" b a a |"D7" c' f f | 
"G" a g g | d/b/ ^a/b/ c'/b/ |"Am" b a a |"D7" c' f f |"G" g g z :|  