public void OnTriggerEnter2D(Collider2D other)
    {
        bool foundColour = false;

        if (other.tag == "Player")
        {
            SimplePlayer player = other.GetComponent <SimplePlayer>();

            if (!foundColour)
            {
                player.addColour(colourRGB);
            }
            au.Play();
            Destroy(gameObject);
        }
    }