Create a series of chord progressions to improve the harmonic structure of the given music piece.
D2 |: B2 dB cA (3AAA | BG (3GFG d2 dc | B2 dB cA (3AAA | dBcA BG G2 | 
 DGBd cA (3AAA | BG (3GFG dedc | BABd cA (3AAA ||1 dBcA BG G2 :|2 
 dBcA BGBc |: dg (3gfg gfde | dcBc d2 Bc | dg (3gfg gfde | dcAB c2 Bc | 
 dg (3gfg gfde | dcBc defd | (3gfg bg (3gfg bg | (3gfg bg afdc :|  
X:1
L:1/8
M:4/4
K:G
 D2 |:"G" B2 dB"D" cA (3AAA |"G" BG (3GFG"D" d2 dc |"G" B2 dB"Am" cA (3AAA |"G" dB"D7"cA"G" BG G2 | 
"G" DGBd"D" cA (3AAA |"G" BG (3GFG"D" dedc |"G" BABd"Am" cA (3AAA ||1"G" dB"D7"cA"G" BG G2 :|2 
"G" dB"D7"cA"G" BGBc |:"G" dg (3gfg gfde | dcBc d2 Bc | dg (3gfg gfde |"Am7" dcAB"D7" c2 Bc | 
"G" dg (3gfg gfde | dcBc"D7" defd |"G" (3gfg bg (3gfg bg |"Em7" (3gfg bg"D7" afdc :|  