!7

p {
  // This doesn't do anything (maybe it's too late?), you need to put it in the command line (-Djava.awt.headless=true).
  System.setProperty("java.awt.headless", "true");
  
  print("Headless: " + isHeadless());
  new CirclesAndLines cal;
  Circle a = cal.circle_autoVis("Yo", 0.2, 0.5);
  Circle b = cal.circle_autoVis("Yo-Yo", 0.8, 0.5);
  cal.arrow(a, "ARROW", b);
  BufferedImage img = cal.makeImage(600, 600);
  byte[] png = toPNG(img);
  print("PNG made. " + l(png) + " bytes");
}

Began life as a copy of #1007546