- (void) smokeEffectAtPosition:(CGPoint)position withDuration:(NSTimeInterval)duration andView:(SKView *)view andPosVector:(CGVector)vector
{
    SKEmitterNode *emitter =  [NSKeyedUnarchiver unarchiveObjectWithFile:[[NSBundle mainBundle] pathForResource:@"SmokeEffect" ofType:@"sks"]];

    emitter.position = position;

    // Calculate the number of particles we need to generate based on the duration
    emitter.particleBirthRate = 100;
    emitter.numParticlesToEmit = duration * emitter.particleBirthRate;
    emitter.particleLifetime = duration;
    emitter.particlePositionRange = vector;

    // Determine the total time needed to run this effect.
    NSTimeInterval totalTime = duration + emitter.particleLifetime + emitter.particleLifetimeRange/2;
    // Run action to remove the emitter from the scene

    if ([self.view isPaused])
        [self.view setPaused:NO];

    [emitter runAction:[SKAction sequence:@[[SKAction waitForDuration:totalTime],
                                            [SKAction removeFromParent]]]
            completion:^{
                if (![self.view isPaused])
                [self.view setPaused:YES];
            }];
    [self addChild:emitter];
}