Construct chordal sequences to boost the harmonious coherence within the specified musical piece.
FA Ad | df{/g} f/^e/f | ae{/f} e/^d/e | fd{/e} d/c/d | FA Ad | df{/g} f/^e/f | 
 ae{/f} e/^d/e/f/ | df d z ::[K:D] !>!A2 !>!d2 | c/c/c EB | A/A/A gc | d/d/d fd | 
 !>!A2 !>!d2 | c/c/c EB | A/A/A gc | d/d/d .d2 ::[K:G] Bc !>!d2 | gB de | 
 eA/B/ cd | dG/A/ BD | Bc !>!d2 | gB de | eA/B/ dc/A/ | Gg g z :: d>G B>e | 
 dB B/A/G | dc c/B/A | ed fg | d>G B>e | dB B/A/G | dc c/B/A | Gg g z :|  
X:1
L:1/8
M:2/4
K:D
"D" FA Ad | df{/g} f/^e/f |"A7" ae{/f} e/^d/e |"D" fd{/e} d/c/d | FA Ad | df{/g} f/^e/f | 
"A7" ae{/f} e/^d/e/f/ |"D" df d z ::[K:D]"D" !>!A2 !>!d2 |"A7" c/c/c EB | A/A/A gc |"D" d/d/d fd | 
 !>!A2"G" !>!d2 |"A7" c/c/c EB | A/A/A gc |"D" d/d/d .d2 ::[K:G]"G" Bc !>!d2 | gB de | 
"D7" eA/B/ cd |"G" dG/A/ BD | Bc !>!d2 | gB de |"D7" eA/B/ dc/A/ |"G" Gg g z ::"G" d>G B>e | 
 dB B/A/G |"D7" dc c/B/A |"G" ed fg | d>G B>e | dB B/A/G |"D7" dc c/B/A |"G" Gg g z :|  