title: Good way to make animations with Cocos2D?
body: <p>I'm making a little iphone game, and I would get some clues.
  Let's imagine:</p>
  
  <p>Two background sprites moving pretty fast from right to left, and moving up and down with accelerometer.</p>
  
  <p>I guess I can't use animations here, cause the movement of the background is recalculated at each frame.
  So I use a schedule with an interval of 0.025s and move my sprites at each clock with a :</p>
  
  <pre><code>sprite.position = ccp(x, y);
  </code></pre>
  
  <p>So here is my problem: the result is laggy, with only these two sprites. </p>
  
  <p>I tried both declaring sprites in the header, and getting them with CCNodes and Tags. It's quite the same.</p>
  
  <p>So if someone can give me a hint on what is the best way to do that, that would be so nice. I wonder if the problem can't be the fact that sprites are moving very fast, but i'm not sure.</p>
  
  <p>Anyway, thanks for your time.</p>
  
  <p>J.</p>