title: Ccocs2d-Durations in actions withDurations
body: <p>Let's take the following code:</p>
  
  <pre><code>    CCTintTo *tint1 = [CCTintTo actionWithDuration:4 red:255 green:0 blue:0];
      CCTintTo *tint2 = [CCTintTo actionWithDuration:4 red:0 green:0 blue:255];
      CCTintTo *tint3 = [CCTintTo actionWithDuration:4 red:0 green:255 blue:0];
      CCSequence *sequence = [CCSequence actions:tint1, tint2, tint3, nil];
      CCRepeatForever *repeat = [CCRepeatForever actionWithAction:sequence];
      CCSpeed *speedAction = [CCSpeed actionWithAction:repeat speed:10];
  </code></pre>
  
  <p>As you can see the first three actions are the actions to tint to Red, Blue and Green respectively in 4 seconds. And then, the sequence of these actions are passed to a CCSpeed action with the speed of 10.Now what I can't understand at all is how these durations work? I mean, first three ones should complete in 4 seconds but the speed method is fast and does not let them last that much. What is the principle I should be aware of in terms of the durations of actions in cases like this?</p>