Design a song that reflects the artistic essence of Bach.  
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 A | A ^G A B | c B !fermata!A A | B B e d | c2 !fermata!B A | A ^G A B | c B !fermata!A A | %7
 B B e d | c2 !fermata!B e | d c B/c/ d | c B !fermata!A c | B A G/^F/ E/F/ | G A !fermata!B B | %13
 c d e3/2 d/ | c d/c/ B2 | !fermata!A3 z |] %16
V:2
 z3 E | F E/D/ C F | E E !fermata!E E | F E E A/^G/ | A2 !fermata!^G E | F E/D/ C F | %6
 E E !fermata!E E | F E E A/^G/ | A2 !fermata!^G A | A/G/ G/F/ F/E/ D/B/ | %10
 ^G/ A G/ !fermata!E A/=G/ | ^F/E/ E/^D/ E/F/ G/D/ | E/ G ^F/ !fermata!G G | G/A/ B B E | %14
 E D/E/ F E/D/ | !fermata!^C3 z |] %16
V:3
 z3 C | B, B, A, D | ^G,/ A, G,/ !fermata!C C | D D ^C D | E ^F/A,/ !fermata!E C | B, B, A, D | %6
 ^G,/ A, G,/ !fermata!C C | D D ^C D | E ^F/A,/ !fermata!E E | F/G/ A/C/ D/E/ A,/D/ | %10
 E/F/ B,/E/ !fermata!C E | ^D/E/ ^F B,3/2 A,/ | B,/D/ E/D/ !fermata!D D | E F G ^G | A A,2 ^G, | %15
 !fermata!E,3 z |] %16
V:4
 z3"Am" A, |"Bm7b5/D" D,"E" E,"F" F,"Bdim/E" E,/D,/ |"C+/E" E,"Esus4" E,"Am" !fermata!A,,"Am" A, | %3
"Bm7b5/A" A,"E7/G#" ^G,"C#dim/G" =G,"Dm/F" F, |"Am/E" E,"D#dim7" ^D,"E" !fermata!E,"Am" A, | %5
"Bm7b5/D" D,"E" E,"F" F,"Bdim/E" E,/D,/ |"C+/E" E,"Esus4" E,"Am" !fermata!A,,"Am" A, | %7
"Bm7b5/A" A,"E7/G#" ^G,"C#dim/G" =G,"Dm/F" F, |"Am/E" E,"D#dim7" ^D,"E" !fermata!E,"Am/C" C | %9
"Dm7/C" C/B,/"Am" A,"Bm7b5/A" A,/G,/"Dm/F" F, |"C+/E" E,/D,/"Esus4" E,"Am" !fermata!A,,"Am" A, | %11
"B7/A" A,/G,/"F#m" ^F,"Em" E,2 |"Em" E,/B,,/"Am7/C" C,/D,/"G" !fermata!G,,"G" G,/=F,/ | %13
"C/E" E,/F,/"Bdim/E" E,/D,/"Cmaj7" C,/D,/"C+" C,/B,,/ | %14
"Am" A,,/C,/"Dm/F" F,/E,/"Bm7b5/D" D,/B,,/"E" E, |"A" !fermata!A,,3 z |] %16  