public IEnumerator TakeWorldDamage(float damagePerSecond)
    {
        while (canTakeDamage)
        {
            health -= damagePerSecond;
            health = Mathf.Clamp(health, 0.0f, maxHealth);
            Debug.Log("You took " + damagePerSecond + " damage from the world.");
            yield return new WaitForSeconds(1.0f);
        }
    }

    public void OnTriggerEnter(Collider other)
    {
        if (other.tag == "Lava")
        {
            canTakeDamage = true;
            StartCoroutine(TakeWorldDamage(10.0f));
        }
    }

    public void OnTriggerExit(Collider other)
    {
        if (other.tag == "Lava")
        {
            canTakeDamage = false;
        }
    }