sing UnityEngine;
using System.Collections;

public class CloudPrefabController : MonoBehaviour {
    public Sprite[] sprites;
    private SpriteRenderer spriteRenderer;

    public float speed;
    private Vector2 endPoint;

    CloudPrefabController(bool onScreen) {
        if (onScreen == true) {
            appearOnScreen ();
        } else {
            appearOffScreen();
        }
    }

    void appearOnScreen() {
        Vector2 startPosition;
        startPosition.x = Random.Range (-5f, 5f);
        startPosition.y = Random.Range (0f, 3f);
        transform.position = startPosition;

        endPoint.x = 8f;
        endPoint.y = startPosition.y;
    }

    void appearOffScreen() {
        Vector2 startPosition;
        startPosition.x = -8;
        startPosition.y = Random.Range (0f, 3f);
        transform.position = startPosition;

        endPoint.x = 8f;
        endPoint.y = startPosition.y;
    }


    // инициализации и служебные методы

    void Awake () {
        spriteRenderer = GetComponent<SpriteRenderer> ();
        spriteRenderer.sprite = sprites[Random.Range(0, sprites.Length)];
        spriteRenderer.sortingLayerName = "bg_clouds";

        speed = 0.3f;
    }

    // Use this for initialization
    void Start () {

    }

    // Update is called once per frame
    void Update () {
        transform.position = Vector2.MoveTowards (transform.position, endPoint, speed * Time.deltaTime);
        Vector2 currentPosition = transform.position;

        if (currentPosition == endPoint) {
            Destroy (gameObject);
        }
    }
}