Wallpaper

using System;
using UnityEngine;
using UnityEngine.UI;

public class WallpaperChanger : MonoBehaviour
{
    public Texture[] wallpapers;
    private RawImage wallpaperImage;

    private void Start()
    {
        wallpaperImage = GetComponent<RawImage>();
        UpdateWallpaper();
    }

    private void Update()
    {

        DateTime currentTime = DateTime.Now;


        int hour = currentTime.Hour;

        if (hour >= 5 && hour < 12)
        {
            SetWallpaper(0);
        }
        else if (hour >= 12 && hour < 18)
        {
            SetWallpaper(1);
        }
        else if (hour >= 18 && hour < 21)
        {
            SetWallpaper(2);
        }
        else
        {
            SetWallpaper(3);
        }
    }

    private void UpdateWallpaper()
    {
        Update();
    }

    public void SetWallpaper(int index)
    {

        if (index >= 0 && index < wallpapers.Length)
        {
            wallpaperImage.texture = wallpapers[index];
        }
    }
}