docs: public synchronized AnimatedLabel startAnimation(long millisecondsPerFrame) {
          if(TIMER == null) {
              TIMER = new Timer("AnimatedLabel");
          }
          AnimationTimerTask animationTimerTask = new AnimationTimerTask(this);
          SCHEDULED_TASKS.put(this, animationTimerTask);
          TIMER.scheduleAtFixedRate(animationTimerTask, millisecondsPerFrame, millisecondsPerFrame);
          return this;
      }