!7

static double timeout = 60; // 60 seconds safety
static double refreshDelay = 0; // 0 seconds to refresh

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;
  long start = sysNow();
  while (l(data) == i
    && licensed()
    && sysNow() < start+timeout*1000)
    sleep(10);
  if ((n = l(data)) < i) i = 0;
  ret hrefresh(refreshDelay, selfLink(i := n))
    + hcenter(
        join("<br>", map(f dynamize, cloneList(data)))
      + p("Bla bla here:", style := "margin-top: 40px")
      + hform(htextinput("add", "", autofocus := 1, style := "text-align: center") + " " + hsubmit("Say"))
    );
    
}