C#紅綠燈

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class Counter : MonoBehaviour {
int num;
double fMyWaitTime=4.0;
double WaitTimecount=0;

// Use this for initialization
void Start () {
num = 0;
}

// Update is called once per frame
void Update () {

Text mytxt=GameObject.Find("Text").GetComponent<Text>();
num = num + 1;
int countnum = num % 4;
mytxt.text =countnum.ToString();
WaitTimecount=0;
mywait ();

if (countnum==0)
{

Image img = GameObject.Find ("Image").GetComponent<Image> ();
img.color = new Color(1.0F,0.0F,0.0F,1.0F); // (紅red,綠green,藍blue,透明)
Image img1 = GameObject.Find ("Image1").GetComponent<Image> ();
img1.color = new Color(0.0F,0.0F,0.0F,1.0F); // (紅red,綠green,藍blue,透明)
Image img2 = GameObject.Find ("Image2").GetComponent<Image> ();
img2.color = new Color(0.0F,0.0F,0.0F,1.0F); // (紅red,綠green,藍blue,透明)
}
if (countnum==1)
{
Image img = GameObject.Find ("Image").GetComponent<Image> ();
img.color = new Color(0.0F,0.0F,0.0F,1.0F); // (紅red,綠green,藍blue,透明)
Image img1 = GameObject.Find ("Image1").GetComponent<Image> ();
img1.color = new Color(0.0F,0.0F,0.0F,1.0F); // (紅red,綠green,藍blue,透明)
Image img2 = GameObject.Find ("Image2").GetComponent<Image> ();
img2.color = new Color(0.0F,0.0F,0.0F,1.0F); // (紅red,綠green,藍blue,透明)


}
if (countnum==2)
{
Image img= GameObject.Find ("Image").GetComponent<Image> ();
img.color = new Color(0.0F,0.0F,0.0F,1.0F); // (紅red,綠green,藍blue,透明)
Image img1 = GameObject.Find ("Image1").GetComponent<Image> ();
img1.color = new Color(1.0F,1.0F,0.0F,1.0F); // (紅red,綠green,藍blue,透明)
Image img2 = GameObject.Find ("Image2").GetComponent<Image> ();
img2.color = new Color(0.0F,0.0F,0.0F,0.1F); // (紅red,綠green,藍blue,透明)

}

if (countnum==3)
{
Image img= GameObject.Find ("Image").GetComponent<Image> ();
img.color = new Color(0.0F,0.0F,0.0F,1.0F); // (紅red,綠green,藍blue,透明)
Image img1 = GameObject.Find ("Image1").GetComponent<Image> ();
img1.color = new Color(0.0F,0.0F,0.0F,1.0F); // (紅red,綠green,藍blue,透明)
Image img2 = GameObject.Find ("Image2").GetComponent<Image> ();
img2.color = new Color(0.0F,1.0F,0.0F,1.0F); // (紅red,綠green,藍blue,透明)

}


}




void mywait()
{

while (WaitTimecount <= fMyWaitTime) {
//do stuff;

WaitTimecount = WaitTimecount + 0.01;
Debug.Log ( WaitTimecount );

}

}

}