i am an idiot help?

Unity Engine
1

does any one know of a way i could make a simple timer for a city building game so that every minute is one 30 secs is one day? help would be nice, i also want help placing buildings so that they take time to build using the timer.

2

do you want to change the speed of the simulation? turtle speed, cheetah speed, llama speed etc.? or just a constant x realtime = y simtime?

3

realtime x = simtime y

4 
using UnityEngine;
using System.Collections;

public class TimerExample : MonoBehaviour {
    public float simTimeElapsedDuration;
    public float simSeconds;
    public float simMinutes;
    public float simHours;
    public float simDays;    
    private float simTimerStart;
    private float simTimerStop;
	// Use this for initialization
	void Start () {
        simTimeElapsedDuration = 5;
        simTimerStart = Time.timeSinceLevelLoad; 
	}
	
	void Update () {
        simTimerStop = Time.timeSinceLevelLoad;
        if ((simTimerStop - simTimeElapsedDuration) >= simTimerStart)
        {
            if ((simSeconds += 1) == 60) {
                simMinutes += 1;
                simSeconds = 0;
            }
            if (simMinutes == 60) {
                simHours += 1;
                simMinutes = 0;
            }
            if (simHours == 24) {
                simDays += 1;
                simHours = 0;
            }
            simTimerStart = Time.timeSinceLevelLoad;
            
        }

   
	}
    
}