How to set a respawn system in cocos2d that is based on a timer?

I want to respawn enemy sprites based on a timer any suggestions would be appreciated. Would be great if you show me some code examples.

   -(void)addEnemyAtX:(int)x y:(int)y {
  CCSprite *enemy = [CCSprite spriteWithFile:@"enemy1.png"];
  enemy.position = ccp(x, y);
  [self addChild:enemy];
  [self animateEnemy: enemy];}

  - (void) enemyMoveFinished:(id)sender {
CCSprite *enemy = (CCSprite *)sender;

    [self animateEnemy: enemy];
 }// a method to move the enemy 10 pixels toward the player
 - (void) animateEnemy:(CCSprite*)enemy
    // speed of the enemy
     ccTime actualDuration = 0.3;

     // Create the actions
        id actionMove = [CCMoveBy actionWithDuration:actualDuration
                                                    position:ccpMult(ccpNormalize(ccpSub(player.position,enemy.position)), 10)];
     id actionMoveDone = [CCCallFuncN actionWithTarget:self
          [enemy runAction:
                 [CCSequence actions:actionMove, actionMoveDone, nil]];



I think you should learn the basics of Cocos2D first ;) It's pretty well covered in the book "Learning Cocos2D" - I recommend it! Nevertheless here is the line of code you want, I doubt though, that it is useful ;)

action = [CCSpawn actions:
          [CCAnimate actionWithAnimation:animation
[CCMoveTo actionWithDuration:2.4f
 position:ccp([self position].x +
[self position].y)],

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