Relative Timelines, but not backwards

Let’s say the result of clicking the first button causes a text-filled rectangle to animate out to a readable position. When the second button is clicked, the first rectangle is pushed off the screen in a different kind of animation, as the second rectangle animates on.
It seems to me one of these is necessary (I suspect it’s the first one):

  • One relative timeline has both animations, one after the other, with a Stop marker between.
  • There are two relative timelines for this one button, one for each animation.