!7

html {
  L<S> triples = lines(params.get("triples"));
  CirclesAndLines cal;
  if (nempty(triples))
    cal = webToCAL(webFromTriples(triples));
  else {
    cal = new CirclesAndLines;
    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, 400);
  ret subBot_serveJPEG(img);
}