title: Show/Hide Sprites & Texts in Phaser
body: <p>I have an image and some text that I want to show/hide:</p>
  
  <pre><code>overlay = this.game.add.image( 0, 0, this.custom_texture.generateTexture() );
  overlay_text = this.game.add.text( 0, 0, 'TESTING 123', style );
  </code></pre>
  
  <p>I tried the <code>destroy()</code> function, but I wasn't able to bring them back, plus I don't think it's necessary to destroy them if I simply want to hide &amp; show them.</p>