Construct a range of chord structures to intensify the harmonic complexity of the provided musical piece.
eg | a2 eg a2 eg | a2 ea fedc | dfBf dfBf | dfba gfeg | a2 eg a2 eg | 
 a2 ea fedc | defd ecBA | E2 G2 A2 :: ed | ceAe ceAe | ceag fedc | 
 dfBf dfBf | dfba gfed | ceAe ceAe | ceag fedc | defd ecBA | E2 G2 A2 :|  
X:1
L:1/8
M:4/4
K:A
 eg |"A" a2 eg a2 eg | a2 ea"F#m" fedc |"Bm" dfBf dfBf | dfba"E7" gfeg |"A" a2 eg a2 eg | 
 a2 ea"F#m" fedc |"D" defd"A" ecBA |"E7" E2 G2"A" A2 :: ed |"A" ceAe ceAe | ceag"F#m" fedc | 
"Bm" dfBf dfBf | dfba"E7" gfed |"A" ceAe ceAe | ceag fedc |"D" defd"A" ecBA |"E7" E2 G2"A" A2 :|  