Create chord progressions that enrich the harmonic structure of the provided musical piece.
AF/G/ AB | Ad f2 | Ac !>!e2 | FA !>!d2 | AF/G/ AB | Ad f2 | Ac e>c | d3 z :: 
 ec/d/ ee | fd/e/ ff | dc c>B | BA F2 | ec/d/ ee | fd/e/ fd | cA f>e | 
 d3 z :|[K:G] Bd d/d/d | !>!e2 !>!d2 | GB B/B/B | !>!c2 !>!B2 | 
 AA/A/ AA | Ac F>A | GB"^C#0" e>^c | d3 d/c/ | Bd d/d/d | !>!e2 !>!d2 | 
 GB B/B/B | !>!c2 !>!B2 | AF/G/ Ad/f/ | gd/e/ fe/d/ | ^cA Bc | d3 g |: 
 g>f fc | e>d dB | B/c/c BA | GB dg | g>f fc | e>d dB | B/c/c BA |1 
 G3 g :|2 G3 z |]  
X:1
L:1/8
M:2/4
K:D
"D" AF/G/ AB | Ad f2 |"A7" Ac !>!e2 |"D" FA !>!d2 | AF/G/ AB | Ad f2 |"A7" Ac e>c |"D" d3 z :: 
"A7" ec/d/ ee |"D" fd/e/ ff |"A7" dc c>B |"D" BA F2 |"A7" ec/d/ ee |"D" fd/e/ fd |"A7" cA f>e | 
"D" d3 z :|[K:G]"G" Bd d/d/d |"C" !>!e2"G/B" !>!d2 |"Em" GB B/B/B |"Am" !>!c2"Em" !>!B2 | 
"A7" AA/A/ AA |"D7" Ac F>A |"G" GB"^C#0" e>^c |"D7" d3 d/c/ |"G" Bd d/d/d |"C" !>!e2"G/B" !>!d2 | 
"Em" GB B/B/B |"C" !>!c2"G" !>!B2 |"D/A" AF/G/ Ad/f/ |"G" gd/e/"D" fe/d/ |"A7" ^cA Bc |"D" d3 g |: 
"D7" g>f fc |"G" e>d dB |"D7" B/c/c BA |"G" GB dg |"D7" g>f fc |"G" e>d dB |"D7" B/c/c BA |1 
"G" G3 g :|2"G" G3 z |]  