Develop a tune influenced by Bach's compositions.  
X:1
T:Music21 Fragment
T:Music21 Fragment
T:Music21
C:Music21
%%score 1 2 3 4
L:1/4
M:3/4
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
 z2 c | c2 B | A B c | Td3 | !fermata!c2 c | c2 d | B A G | c3 | !fermata!B2 B | c2 c | d2 e | d3 | %12
 !fermata!d2 e | f2 e | d e/d/ c | c/d/ d3/2 c/ | !fermata!c3 |] %17
V:2
 z2 G | A2 G | F G G | A G2 | !fermata!G2 G | G2 A | G2 G | G ^F/E/ F | !fermata!G2 ^G | A2 A | %10
 F2 E | ^F G/F/ A/G/ | !fermata!G2 B | c d G | A B E/F/ | G A G | !fermata!G3 |] %17
V:3
 z2 E | E2 E/D/ | C D C | C2 B, | !fermata!E2 E | E2 D | D2 D | E D C | !fermata!D2 E | E2 F | %10
 B,2 C | C B,/A,/ C/B,/ | !fermata!B,2 E | E D C | C B, C | C2 B, | !fermata!E3 |] %17
V:4
 z2"C" C |"Am" A,2"Em" E, |"F" F,2"C/E" E, |"Dm7/F" F,"G" G,2 |"C" !fermata!C,2"C" C | %5
"C/E" E,2"D/F#" ^F, |"G" G,"G" A,"G/B" B, |"Am7" A,3 |"G" !fermata!G,2"E" E, |"Am" A,2"F" F, | %10
"Bdim/D" D,2"C" C, |"D" D,3 |"G" !fermata!G,2"E/G#" ^G, |"Fmaj7/A" A,"Bdim" B,"C" C | %14
"D7/F#" ^F,"E/G#" ^G,"Am" A, |"C/E" E,"Dm7/F" F,"G" G, |"C" !fermata!C,3 |] %17  