title: How to use animatorSet to change background color of a View
body: <p>I am aiming at animating different things simultaneously.
  I have successfully used AnimatorSet to scale up my textView</p>
  
  <pre><code>val textViewAnimatorX = ObjectAnimator.ofFloat(txtView, View.SCALE_X, 0.8f, 1.2f)
  val textViewAnimatorY = ObjectAnimator.ofFloat(txtView, View.SCALE_Y, 0.8f, 1.2f)
  
  val animatorSet = AnimatorSet()
  animatorSet.playTogether(textViewAnimatorX, textViewAnimatorY)
  animatorSet.setDuration(500)
  animatorSet.start()
  </code></pre>
  
  <p>How can i use animator set to simultaneously change the root view background color?</p>