void OnCollisionEnter2D(Collision2D col)
    {
        GameObject other = col.gameObject;

        if (other.name == "Player")
        {
            DamageData playerDamage = other.GetComponent <DamageData>();
            if (playerDamage != null)
            {
                playerDamage.addHealth(damageData.health);
                Destroy(gameObject);
            }
        }
    }