Construct chordal sequences to boost the harmonious coherence within the specified musical piece.
|: A | F<A f>e d2 B>d | A>F G/F/E/D/ C<E E>G | F<A f>e d2 B>d | 
 Ad c/d/e/c/ d2- d :| | f/g/ | a>fd>f e>d B<d | A>Bd>e f2 f>e | 
 d>ef>g a>b a>f | (3gfe f>d e<e e>f | d>ef>g a>b a>f | 
 g/f/g/a/ b/a/g/f/ e2 a>g | f<a d<f B>d G<B | Ad c/d/e/c/ d2- d |]  
X:1
L:1/8
Q:1/8=126
M:4/4
K:D
|: A |"D" F<A f>e"G" d2 B>d |"D" A>F G/F/E/D/"A7" C<E E>G |"D" F<A f>e"G" d2 B>d | 
"A7" Ad c/d/e/c/"D" d2- d :| | f/g/ |"D" a>fd>f"G" e>d B<d |"D" A>Bd>e f2"F#7" f>e | 
"Bm" d>ef>g"F#m" a>b a>f |"Em" (3gfe f>d"A7" e<e e>f |"D" d>ef>g"F#m" a>b a>f | 
"Em" g/f/g/a/ b/a/g/f/"A7" e2 a>g |"D" f<a d<f"G" B>d G<B |"A7" Ad c/d/e/c/"D" d2- d |]  