svoid g22drawConnectingCurve(Graphics2D g, Pt start, Pt end, int clipAmount default 4) {
  var controlY = random(0, 40);

  var control = doublePt(avg(start.x, end.x), controlY);
  var path = new Path2D.Float;
  path.moveTo(start.x, start.y);
  path.quadTo(control.x, control.y, end.x, end.y);
  
  var color = oneOf(ll((Color.black), (Color.gray), (Color.red)));
  var g2 = (Graphics2D) g.create();
  g2.setColor(color);
  
  if (clipAmount != 0) {
    Rect clip = rectFromPoints(start.x+clipAmount, 0,
      end.x-clipAmount, max(end.y, start.y)-clipAmount);
    print(+clip);
    g2.clipRect(clip.x, clip.y, clip.w, clip.h);
  }
  
  g2.draw(path);
}