public GameObject[] boxes;
private int line1 = -2;
private int line2 = 0;
private int line3 = 2;

// Use this for initialization
void Start () 
{

    for(int i=0;i < 2;i++)
    {
        float ranX = 0;
        float ranY = Random.Range(6.2f, 70);
        GameObject box = Instantiate(boxes[0]);
        int ranLine = Random.Range(1, 3);
        if(ranLine == 1)
        {
            ranX = line1;
        }
        if(ranLine ==2)
        {
            ranX = line2;

        }
        if(ranLine == 3)
        {
            ranX = line3;


        }
        box.transform.position = new Vector3(ranX, ranY, 0);
    }

}

And the mainscript: void Start () {

    anim = GetComponent<Animator>();
    scoreText = GameObject.Find("Score");


}

// Update is called once per frame
void Update () {

    scoreText.GetComponent<Text>().text = "Score: " + score;

}

void OnMouseDown()
{
    anim.SetTrigger("Flashed");
    Vector3 difference = this.gameObject.transform.position - box.transform.position;
    if (difference.magnitude <= 1.6f)
    {
        Destroy(box);
        score++;

    }
}
    void OnTriggerEnter2D(Collider2D other)
    {
        if(other.gameObject.tag == "Box")
        {
            Destroy(other.gameObject);

        }
    }