Construct a range of chord structures to intensify the harmonic complexity of the provided musical piece.
|: ggab c'c'ba | agg2- gc'ba |"^(G)" agg2 gaag | gff2- fggf | e2d2 c4 :: 
 gefd cee2 | fdec Bd"^(3times)"d2 ::[K:G]"^G" ddef ggfe | edd2- dgfe | 
"^(D)" edd2 deed | dcc2- cddc | B2A2 G4 :: dBcA GBB2 | 
 cABG FA"^(3times)"A2 :|  
X:1
L:1/16
M:2/4
K:C
|:"C" ggab"F" c'c'ba |"C" agg2- gc'ba |"^(G)" agg2 gaag |"G" gff2- fggf |"C" e2"G"d2"C" c4 :: 
"C" ge"G"fd"C" cee2 |"G" fd"D"ec"G" Bd"^(3times)"d2 ::[K:G]"^G""G" ddef"C" ggfe |"G" edd2- dgfe | 
"^(D)" edd2 deed |"D" dcc2- cddc |"G" B2"D"A2"G" G4 ::"G" dB"D"cA"G" GBB2 | 
"D" cA"A"BG"D" FA"^(3times)"A2 :|  