private void Update()
    {
        currentSliderFreq = parent.GetCurrentfreq();

        if ((currentSliderFreq < (optimalFreq - freqRange)) || (currentSliderFreq > (optimalFreq + freqRange)))
        {
            image.color = new Color(1, 1, 1, 0);
        }
        else
        {
            image.color = new Color(1, 1, 1, 1);
        }

        //Disable/Enable Button
        if (image.color.a < 0.2f)
        {
            button.enabled = false;
        }
        else
        {
            button.enabled = true;
        }
    }