Compose a piece that reflects the artistic essence of Bach's works.  
X:1
T:Music21 Fragment
T:Music21 Fragment
T:Music21
C:Music21
%%score 1 2 3 4
L:1/4
M:4/4
K:C
V:1 treble 
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
V:2 treble 
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
V:3 treble 
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
V:4 bass 
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
V:1
 z3 c | g g g g | a g/f/ !fermata!e d | e/^f/ g a a | !fermata!g2 z g | g g g e/f/ | %6
 g f/e/ !fermata!d g | f e d d | c/d/ e/f/ !fermata!g g | f e/d/ e d | !fermata!c3 z |] %11
V:2
 z3 G | G/A/ B c c | c B !fermata!c d | c B A/B/ c | !fermata!B2 z d | c B c c | %6
 c d/c/ !fermata!B B | c/ d c A/ B | c2 !fermata!B c | c c c B | !fermata!G3 z |] %11
V:3
 z3 E | D G/F/ E/F/ G | F/E/ D/G/ !fermata!G G | C D E ^F | !fermata!D2 z G/F/ | E F G A | %6
 G A !fermata!D E | E/D/ E/F/ G F | E A !fermata!G E | F/G/ A G G/F/ | !fermata!E3 z |] %11
V:4
 z3"C" C |"G/B" B,"G" G,"C" C/D/"C/E" E |"F" F,"G" G,"C" !fermata!C"G/B" B, | %3
"Am" A,"G" G,"Am/C" C"D7" D |"G" !fermata!G,2 z"G/B" B, |"C" C"G7/D" D"C/E" E"Am" A, | %6
"C/E" E,"Dm/F" F,"G" !fermata!G,"Em" E, |"Fmaj7/A" A,/B,/"C" C"Gsus4" G,"G#dim7" ^G, | %8
"Am" A,/B,/"Am/C" C/D/"Em" !fermata!E"C" C |"F/A" A,"Am7/G" G,/F,/"C/G" G,"G" G, | %10
"C" !fermata!C,3 z |] %11  