Construct chordal sequences to boost the harmonious coherence within the specified musical piece.
|: A | dfe dfe | d2 A A2 G | FAd Bcd | egf e2 A | dfe dfe | d2 A A2 G | FAd Adc | 
 d3 d2 :: a | a2 f dfa | b2 g efg | a2 d c2 d | ecA A2 a | a2 f dfa | 
 b2 g efg | afd Adc | d3 d2 :|  
X:1
L:1/8
M:6/8
K:D
|: A |"D" dfe dfe | d2 A A2 G | FAd"G" Bcd |"A" egf e2 A |"D" dfe dfe | d2 A A2 G | FAd"A" Adc | 
"D" d3 d2 :: a |"D" a2 f dfa |"G" b2 g efg |"D" a2 d c2 d |"A" ecA A2 a |"D" a2 f dfa | 
"G" b2 g efg |"D" afd"A" Adc |"D" d3 d2 :|  