title: How to make this layout (photo)
body: <p>I am trying to make similar layout to this one.</p>
  
  <p>I achieved everything except that pop up window (saying "Perfect"). How to make this? Will pop up windows? Dialog or somehow else?</p>
  
  <p><img src="https://i.stack.imgur.com/8PZnY.png" alt="screen shot"></p>