VRCycling/Assets/Scripts/TrafficSimulation/RedLightStatus.cs

// Traffic Simulation
// https://github.com/mchrbn/unity-traffic-simulation

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

public class RedLightStatus : MonoBehaviour
{

    public int lightGroupId;  // Belong to traffic light 1 or 2?
    public Intersection intersection;
    
    Light pointLight;

    void Start(){
        pointLight = this.transform.GetChild(0).GetComponent<Light>();
        SetTrafficLightColor();
    }

    // Update is called once per frame
    void Update(){
        SetTrafficLightColor();
    }

    void SetTrafficLightColor(){
        if(lightGroupId == intersection.currentRedLightsGroup)
            pointLight.color = new Color(1, 0, 0);
        else
            pointLight.color = new Color(0, 1, 0);
    }
}