title: Changing display Image when interacting to other display
body: <p>I'm new in corona and I'm trying to make a very simple game for android. I have a two display which is "ball" and "stone" both of them have added a physics, now what I'm trying to do is to detect or check if the ball touches the stone then I will change the image of the ball.</p>
  
  <p>Any thought will be highly appreciated. </p>