Construct a range of chord structures to intensify the harmonic complexity of the provided musical piece.
|: F2 FE D4 | F2 FG A2 AG | A8 | A2 AA A4 | B3 A G2 AG |1 F8 :|  
X:1
L:1/8
Q:1/4=120
M:4/4
K:D
|:"D" F2 FE"D" D4 |"D" F2 FG"D" A2 AG |"D" A8 |"D" A2 AA"D" A4 |"Bm" B3 A"G" G2 AG |1"D" F8 :|  