TimeManager

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


public class TimeCounter : MonoBehaviour
{
    public List<TimeContainer> timeCon;

    // Update is called once per frame
    void Update()
    {
        if (timeCon.Count > 0)
        {
            float realtime;
            float second = 0;
            realtime = Time.deltaTime;
            second += realtime;
            if (second >= 1)
            {
                TimerController();
                second = 0;
            }
        }
    }

    public int CreateTimeItem(int _Hours, int _Minutes, int _Seconds, bool _CountUpOrDownIO)
    {
        timeCon.Add(new TimeContainer(_Hours, _Minutes, _Seconds, _CountUpOrDownIO));
        return timeCon.Count;
    }

    public void TimerController()
    {
        for (int i = 0; i < timeCon.Count; i++)
        {
            if (timeCon[i].countUpDownIO)
            {
                timeCon[i].sec += 1;
                if (timeCon[i].sec > 59)
                {
                    timeCon[i].min += 1;
                    timeCon[i].sec = 0;
                }
                if (timeCon[i].min > 59)
                {
                    timeCon[i].hour += 1;
                    timeCon[i].min = 0;
                }
            }
            else
            {
                if (timeCon[i].hour < 1 &&
                    timeCon[i].min < 1 &&
                    timeCon[i].sec < 1)
                {
                    timeCon.Remove(timeCon[i]);
                }
                timeCon[i].sec -= 1;
                if (timeCon[i].sec < 1)
                {
                    timeCon[i].min -= 1;
                    timeCon[i].sec = 60;
                }
                if (timeCon[i].min < 1)
                {
                    timeCon[i].hour -= 1;
                    timeCon[i].min = 60;
                }
            }
        }
    }
}

[Serializable]
public class TimeContainer
{
    public int hour;
    public int min;
    public int sec;
    public bool countUpDownIO;
    public TimeContainer(
        int _hour,
        int _min,
        int _sec,
        bool _countUpDownIO)
    {
        hour = _hour;
        min = _min;
        sec = _sec;
        countUpDownIO = _countUpDownIO;
    }
}