title: put sprites hidden on screen,than fade them in
body: <p>I need to put some <code>CCsprites</code> on screen that later on will be fade in to screen.
  I cant hide them ,because the <code>CCFade</code> action will not work on hidden sprite , or a sprite with <code>opacity=0</code> .</p>
  
  <p>What i do is put them on screen and fade them out :</p>
  
  <pre><code>[colors[i] runAction:[CCFadeOut actionWithDuration:0]];
  [self addChild:colors[i] z:0];
  </code></pre>
  
  <p>it turned out that fading out in zero time is <code>not unseen</code>, so they appear for a second the moment i add them to <code>CCScene.</code> </p>
  
  <p>How would i put them on screen to be unseen, and than fade them in with <code>CCFadeIn</code> action ?</p>