public void cycle(String msg) {
   if (ct != null) {
     cycleStop();
   }
   ct = new CycleThread(msg, 300);
   ct.start();
 }
 public void cycle(String msg, int delay) {
   if (ct != null) {
     cycleStop();
   }
   ct = new CycleThread(msg, delay);
   ct.start();
 }
 public void cycleStop() {
   if (ct != null) {
     ct.isRunning = false;
   }
 }