bool playerHasPoints = false;

    bool canBuyFirstSkill = false;
    bool canBuySecondSkill = false;
    bool canBuyThirdSkill = false;
    bool canBuyFourthSkill = false;

    public Button firstButton;
    public Button secondButton;
    public Button thirdButton;
    public Button fourthButton;

    public GameObject firstPurchase;
    public GameObject secondPurchase;
    public GameObject thirdPurchase;
    public GameObject fourthPurchase;

    public static int IQ = 0;

    bool buttonInteractable;

    [Header("Audio")]
    public AudioSource myFx;
    public AudioClip SkillUpgraded;
    public AudioClip cantBuySkill;
    public AudioClip hoverFx;

    public void BuySkillSound()
    {
        myFx.PlayOneShot(SkillUpgraded);
    }

    public void cantBuySkillSound()
    {
        myFx.PlayOneShot(cantBuySkill);
    }

    public void HoverSound()
    {
        myFx.PlayOneShot(hoverFx);
    }

    private void Start()
    {
        firstPurchase.SetActive(false);
        secondPurchase.SetActive(false);
        thirdPurchase.SetActive(false);
        fourthPurchase.SetActive(false);
    }

    private void Update()
    {
        if (Points.pointsValue >= 1)
        {
            playerHasPoints = true;
            buttonInteractable = true;
        }
        else if (Points.pointsValue < 1)
        {
            playerHasPoints = false;
            buttonInteractable = false;
        }

        if (playerHasPoints == true)
        {
            canBuyFirstSkill = true;
        }
    }

    public void FirstSkillPurchase()
    {
        if (playerHasPoints == true & canBuyFirstSkill == true & buttonInteractable == true)
        {
            IQ += 1;
            firstButton.interactable = false;
            Points.pointsValue -= 1;
            firstPurchase.SetActive(true);
            canBuySecondSkill = true;
            canBuyFirstSkill = false;
            BuySkillSound();
        }
        else
        {
            cantBuySkillSound();
        }
    }

    public void SecondSkillPurhchase()
    {
        if (playerHasPoints == true && canBuySecondSkill == true & buttonInteractable == true)
        {
            IQ += 1;
            secondButton.interactable = false;
            Points.pointsValue -= 1;
            secondPurchase.SetActive(true);
            canBuyThirdSkill = true;
            canBuySecondSkill = false;
            BuySkillSound();
        }
        else
        {
            cantBuySkillSound();
        }
    }

    public void ThirdSkillPurchase()
    {
        if (playerHasPoints == true && canBuyThirdSkill == true & buttonInteractable == true)
        {
            IQ += 1;
            thirdButton.interactable = false;
            Points.pointsValue -= 1;
            thirdPurchase.SetActive(true);
            canBuyFourthSkill = true;
            canBuyThirdSkill = false;
            BuySkillSound();
        }
        else
        {
            cantBuySkillSound();
        }
    }

    public void FouthSkillPurchase()
    {
        if (playerHasPoints == true && canBuyFourthSkill == true & buttonInteractable == true)
        {
            IQ += 1;
            fourthButton.interactable = false;
            Points.pointsValue -= 1;
            fourthPurchase.SetActive(true);
            canBuyFourthSkill = false;
            BuySkillSound();
        }
        else
        {
            cantBuySkillSound();
        }
    }

    public void DeactivateButtons()
    {
        if (buttonInteractable == false)
        {
            firstButton.interactable = false;
            secondButton.interactable = false;
            thirdButton.interactable = false;
            fourthButton.interactable = false;
        }
    }


    public void ResetPoints()

    {
        firstPurchase.SetActive(false);
        secondPurchase.SetActive(false);
        thirdPurchase.SetActive(false);
        fourthPurchase.SetActive(false);

        canBuyFirstSkill = true;
        canBuySecondSkill = false;
        canBuyThirdSkill = false;
        canBuyFourthSkill = false;

        firstButton.interactable = true;
        secondButton.interactable = true;
        thirdButton.interactable = true;
        fourthButton.interactable = true;

        IQ = 0;
    }