Craft a musical masterpiece that imitates Bach's signature style  
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 bass 
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
V:3 bass 
%%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
L:1/8
V:1
 z3 C | C B, C2 | E G F E | D D !fermata!D G, | A,/B,/ C C B, | !fermata!C2 z C/D/ | E D E F | %7
 G2 !fermata!D D | D D D D | E2 !fermata!E C | B, A, A, ^G, | !fermata!A,3 z |] %12
V:2
 z3 A, | G, G, G,2 | C D C/D/ D/C/ | C/B,/ A, !fermata!G, G, | F, G,/A,/ G, G, | %5
 !fermata!G,2 z G, | C D C C | C2 !fermata!B, D/C/ | B, A, B, B, | %9
 B,/A,/ B,/^G,/ !fermata!A, A,/=G,/ | =F, E, F, E, | !fermata!E,3 z |] %12
V:3
 z3 E, | E, D,/4E,/4F,/ E,2 | G, G, A,/G,/ G, | G, D,/ C, !fermata!B,,/ C, | C,/D,/ E, D,/E,/ F, | %5
 E,2 z E,/F,/ | G, G, G, A, | G,2 !fermata!G, A, | G, ^F, G, G, | ^G,/^F,/ E,/D,/ !fermata!C, E, | %10
 D,3/2 C,/ B,,3/2 D,/ | !fermata!^C,3 z |] %12
V:4
 z6"Am" A,,2 |"C/E" E,,F,,"G" G,,2"C" C,,4 |"C" C,3 B,,"F/A" A,,B,,"C" C,2 | %3
"Gsus4" G,,2"D/F#" ^F,,2"Gsus4" !fermata!G,,2"C/E" E,,2 | %4
"F" F,,2"C/E" E,,F,,"Gsus4" G,,2"G" G,,,2 |"C" !fermata!C,,4 z2"C" C,,2 | %6
"C" C,3 B,,"C" C,B,,"F/A" A,,2 |"C/E" E,,D,,"C/E" E,,F,,"G" !fermata!G,,2"D/F#" ^F,,2 | %8
"G" G,,B,,"D" D,C,"G/B" B,,A,,"G" G,,=F,, |"E" E,,^F,,"E/G#" ^G,,E,,"Am" !fermata!A,,2"Am" A,,2 | %10
"Bm7b5/A" A,,^G,,"Asus4" A,,C,,"Bm7b5/D" D,,B,,,"E" E,,2 |"A" !fermata!A,,,6 z2 |] %12  