Formulate chord sequences to heighten the harmonic quality of the specified musical portion.
|: A3/2 B/ A G | F A d2 | E F G (3(F/G/F/) | E F G ^G | A3/2 B/ A G | 
 F A d3/2 d/ | c A G E | D2 D2 :: d3/2 e/ f d | c A A2 | B G G/A/B/G/ | 
 B A A2 | d3/2 e/ f d | c a a3/2 a/ | b a g e | d2 d2 :|  
X:1
L:1/4
M:4/4
K:D
|:"D" A3/2 B/ A G |"D" F A d2 |"Em" E F G (3(F/G/F/) |"A7" E F G ^G |"D" A3/2 B/ A G | 
"D" F A d3/2 d/ |"A7" c A G E |"D" D2 D2 ::"D" d3/2 e/ f d |"A" c A A2 |"G" B G G/A/B/G/ | 
"D" B A"A7" A2 |"D" d3/2 e/ f d |"A" c a a3/2 a/ |"G" b a"A7" g e |"D" d2 d2 :|  