Two touches in touchesBegan in objective c - ios

Question

I have two touches in method "touchesBegan" they both starts at the same time, but i want to second touch to wait while first touch end. How can i achieve that? Here are what I have:
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
for (UITouch *touch in touches) {
CGPoint location =[touch locationInView:self.view];
SKNode *touchedNode = [self nodeAtPoint:location];
if(touchedNode && [touchedNode.name isEqual:#"tapButton"]){
[self runAction:[SKAction playSoundFileNamed:#"buttons.wav" waitForCompletion:NO]];
[self createBackLn];
[self createBottom];
[self ballCreate];
[tapButton removeFromParent];
}
if (groupSprite.children.count < 3) {
CGPoint touchlocation = [touch locationInNode:self];
CGPoint location = CGPointMake(touchlocation.x, IS_IPAD()?108: 75);
sprite = [SKSpriteNode spriteNodeWithImageNamed:#"board"];
if(IS_IPAD()){
sprite.xScale = 0.5;
sprite.yScale = 0.7;
}else{
sprite.xScale = 0.3;
sprite.yScale = 0.5;
}
sprite.position = location;
sprite.zPosition = 2;
sprite.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:sprite.frame.size];
sprite.physicsBody.dynamic = NO;
sprite.physicsBody.categoryBitMask = boardCategory;
sprite.physicsBody.contactTestBitMask = ballCategory | secballCategory;
SKAction *delay = [SKAction waitForDuration:IS_IPAD()?0.6:0.4];
SKAction *remove = [SKAction removeFromParent];
SKAction *actionSequence = [SKAction sequence:#[delay,remove]];
[sprite runAction:actionSequence];
[groupSprite addChild:sprite];
}
}
}