!7

static L<S> data = synchroList(ll("Start."));

html {
  S add = params.get("add");
  if (nempty(add) && neq(last(data), add)) data.add(add);
  
  int i = toInt(params.get("i"));
  int n;
  while (l(data) == i && licensed()) sleep(10);
  if ((n = l(data)) < i) i = 0;
  ret hrefresh(1, selfLink(i := n))
    + join("<br>", cloneList(data));
}