// This macro demonstrates how to add lines that vary
// in width to an overlay. Requires ImageJ 1.52i or later.

  newImage("Untitled", "8-bit ramp", 400, 600, 1);
  setColor("red");
  width = 1;
  for (y=50; y<600; y+=50) {
     setLineWidth(width++);
     Overlay.drawLine(0, y, 512, y);
  }
  Overlay.show;