Scriptum/Assets/breakable.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;


public class breakable : MonoBehaviour
{

    public Sprite[] sprites;
    private int oldSprite;
    private int newSprite;
    private List<int> availableSprites = new List<int>();
    public ParticleSystem collisionParticleSystem;
    public bool timeToBreak = false;



    void Start()
    {
        oldSprite = 0;
        for(int i=0; i<3; i++)
        {
            availableSprites.Add(i);
        }
        int rock = PlayerPrefs.GetInt("rock");
        if(rock == 0)
        {
            Destroy(gameObject);
        }
    }

    IEnumerator Timer()
    {
        if (timeToBreak == true){
            PlayerPrefs.SetInt("rock", 0);
            Destroy(gameObject);
        }
        yield return new WaitForSeconds(1);
        var em = collisionParticleSystem.emission;
        em.enabled = false;
    }

    private void OnTriggerEnter2D(Collider2D collision)
    {
        var em = collisionParticleSystem.emission;
        em.enabled = true;
        if (collision.tag == "Player")
        {
            collisionParticleSystem.Play();
            if (oldSprite == 0)
            {
                newSprite = availableSprites[1];
                oldSprite = 1;
                GetComponent<SpriteRenderer>().sprite = sprites[newSprite];
            }
            else if (oldSprite == 1)
            {
                newSprite = availableSprites[2];
                oldSprite = 2;
                GetComponent<SpriteRenderer>().sprite = sprites[newSprite];
            }
            else if (oldSprite == 2)
            {
                timeToBreak = true;
                StartCoroutine(Timer());
            }
            GetComponent<SpriteRenderer>().sprite = sprites[newSprite];
            StartCoroutine(Timer());
        }

    }
}