public GameObject pushButton;
    public GameObject standardButton;
    public GameObject pushedButton;

    public Animator anim;

    private void Start()
    {
        anim.enabled = true;

        pushButton.SetActive(false);
        standardButton.SetActive(true);
        pushedButton.SetActive(false);
    }

    private void OnTriggerEnter(Collider other)
    {
        pushButton.SetActive(true);
    }

    private void OnTriggerExit(Collider other)
    {
        pushButton.SetActive(false);
    }

    private void Update()
    {
        if (pushButton.activeInHierarchy == true && Input.GetKeyDown(KeyCode.E))
        {
            anim.SetBool("ButtonPressed", true);
            GetComponent<BoxCollider>().enabled = false;
            standardButton.SetActive(false);
            pushedButton.SetActive(true);
            pushButton.SetActive(false);
            FindObjectOfType<SoundController>().buttonPressed.Play();
            FindObjectOfType<SoundController>().doorOpening.Play();
        }
    }
}