Create a series of chord progressions to improve the harmonic structure of the given music piece.
GA |: BGDG BdcB | cAFA c2 Bc | dGG_G =GBAG | A_GD_G A4 | BGDG BdcB | 
 cAFA c2 Bc | d2 ed cBAc | BGG_G =G2 :: gdgb agab | 
 gdBd G4 | C2 FA FABc | d_G=GA dcBA | G3 b agab | gdBd GABc | 
 d2 ed cBAc | BGG_G | =G8 :|  
X:1
L:1/8
M:4/4
K:Gmin
 GA |:"Am" BGDG BdcB |"G/A" cAFA c2 Bc |"Fmaj7/A" dGG_G =GBAG |"E7" A_GD_G A4 |"Am" BGDG BdcB | 
"G/A" cAFA c2 Bc |"Fmaj7" d2 ed"E7" cBAc |"Am" BGG_G =G2 ::"Am" gdgb"G/B" agab | 
"Am/C" gdBd"Am" G4 |"G" C2 FA FABc |"E7" d_G=GA dcBA |"Am" G3 b"G/B" agab |"Am/C" gdBd"Am" GABc | 
"Fmaj7" d2 ed"E7" cBAc |"Am" BGG_G | =G8 :|  