void generateGraph(float testvalue, int c, int colour) {
  int m = 50 + int(testvalue/0.06);
  m = constrain(m, 10, 90);

  pg.beginDraw();
  pg.background(255);
  pg.smooth();

  if (c==0) {
    pg.noFill();
    pg.beginShape();
    for (int i=0;i<=m;i++) {
      pg.vertex(map(i, 0, 100, 5, gwidth-5), map(graphdata[i], 0, 0.4, gheight-5, 5));
    }
    pg.vertex(map(m, 0, 100, 5, gwidth-5), gheight-5);
    pg.endShape(CLOSE);

    if (colour ==0) {
      pg.fill(255, 0, 0);
    }
    else if (colour ==1) {
      pg.fill(0, 255, 0);
    }
    else {
      pg.fill(0, 0, 255);
    }
    pg.beginShape();
    for (int i=m;i<=100;i++) {
      pg.vertex(map(i, 0, 100, 5, gwidth-5), map(graphdata[i], 0, 0.4, gheight-5, 5));
    }
    pg.vertex(map(m, 0, 100, 5, gwidth-5), gheight-5);
    pg.endShape(CLOSE);
  } 
  else if (c == 1) {
    if (colour ==0) {
      pg.fill(255, 0, 0);
    }
    else if (colour ==1) {
      pg.fill(0, 255, 0);
    }
    else {
      pg.fill(0, 0, 255);
    }
    pg.beginShape();
    for (int i=0;i<=m;i++) {
      pg.vertex(map(i, 0, 100, 5, gwidth-5), map(graphdata[i], 0, 0.4, gheight-5, 5));
    }
    pg.vertex(map(m, 0, 100, 5, gwidth-5), gheight-5);
    pg.endShape(CLOSE);

    pg.noFill();
    pg.beginShape();
    for (int i=m;i<=100;i++) {
      pg.vertex(map(i, 0, 100, 5, gwidth-5), map(graphdata[i], 0, 0.4, gheight-5, 5));
    }
    pg.vertex(map(m, 0, 100, 5, gwidth-5), gheight-5);
    pg.endShape(CLOSE);
  }
  else {
    if (m>50) {
      m = 100-m;
    }

    if (colour ==0) {
      pg.fill(255, 0, 0);
    }
    else if (colour ==1) {
      pg.fill(0, 255, 0);
    }
    else {
      pg.fill(0, 0, 255);
    }
    pg.beginShape();
    for (int i=0;i<=m;i++) {
      pg.vertex(map(i, 0, 100, 5, gwidth-5), map(graphdata[i], 0, 0.4, gheight-5, 5));
    }
    pg.vertex(map(m, 0, 100, 5, gwidth-5), gheight-5);
    pg.endShape(CLOSE);

    pg.noFill();
    pg.beginShape();
    pg.vertex(map(m, 0, 100, 5, gwidth-5), gheight-5);
    for (int i=m;i<=100-m;i++) {
      pg.vertex(map(i, 0, 100, 5, gwidth-5), map(graphdata[i], 0, 0.4, gheight-5, 5));
    }
    pg.vertex(map(100-m, 0, 100, 5, gwidth-5), gheight-5);
    pg.endShape(CLOSE);

    if (colour ==0) {
      pg.fill(255, 0, 0);
    }
    else if (colour ==1) {
      pg.fill(0, 255, 0);
    }
    else {
      pg.fill(0, 0, 255);
    }
    pg.beginShape();
    for (int i=100-m;i<=100;i++) {
      pg.vertex(map(i, 0, 100, 5, gwidth-5), map(graphdata[i], 0, 0.4, gheight-5, 5));
    }
    pg.vertex(map(100-m, 0, 100, 5, gwidth-5), gheight-5);
    pg.endShape(CLOSE);
  }

  pg.endDraw();
}