SushkaCraftHabr

using UnityEngine;
using System.Collections.Generic;

public class Breakfast : MonoBehaviour
{
    public GameObject[] objects;
    private List<int> _remainingObjects;
    
    public void Start()
    {
        InitializeObjects();
    }

    public void Push()
    {
        if (_remainingObjects.Count == 0)
        {
            InitializeObjects();
        }

        int randomIndex = Random.Range(0, _remainingObjects.Count);
        int objectToShowIndex = _remainingObjects[randomIndex];

        objects[objectToShowIndex].SetActive(true);

        _remainingObjects.RemoveAt(randomIndex);
    }

    private void InitializeObjects()
    {
        _remainingObjects = new List<int>();
        for (int i = 0; i < objects.Length; i++)
        {
            _remainingObjects.Add(i);
            objects[i].SetActive(false);
        }
    }
}