title: How to move sprite from right to left of screen using CGPathAddArc
body: <p>my sprite position is (screenWidth, screenHeigh/2). i have tried a lot of code which using CGPathAddArc to move sprite from right to left but not success. apple document is so hard to understand. so i post here with a hope someone can help me.
  this is one of the code i had used.</p>
  
  <pre><code>if (iPad) {
          CGPathAddArc(thePath, NULL, 384.0f , 768, 384.0f , 0.f, -M_PI*3/2, NO);
  }
  SKAction *moveAction = [SKAction followPath:thePath asOffset:YES orientToPath:NO duration:(5.0f/200.0f)*(iPad ? 384.0f :200.f)];
  </code></pre>
  
  <p>many thank in advance</p>