Light/ Colour Script

using UnityEngine;
using System.Collections;
public class DoorControl : MonoBehaviour {

 public bool toggleDoor = false;

 private bool doorOpen = false;
 private const string strOpen = "Open";
 private const string strClose = "Close";

 public TextMesh counterTM;
 private int counter = 0;

 public Light redLight;
 public Light blueLight;
 public Light greenLight;
 public Light orangeLight;

 public int currentCycleState = NONE;
 public float nextCycleTime = 0f;
 public bool enableCyclingOfLights = false;

 //public int countTo4 = 0;
 // Use this for initialization
 void Start () {

 }

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

  if ( enableCyclingOfLights )
  {
   if ( nextCycleTime < Time.time )
  
   {
   CycleEachLight();
  
   }
  }


  else if (toggleDoor)
  {
   doorOpen = !doorOpen;
 
   if (doorOpen)
   {
    animation.Play(strOpen);
    counter++;
    counterTM.text = counter.ToString ();
  
    // when door is opened and the counter changes
    // check if the lights need to be changed
    UpdateLightsStates( counter );

   }
   else
   {
    animation.Play(strClose);
    counterTM.text = "Closing Door";
   }

   toggleDoor = false;
 
  }
 }

 void CycleEachLight()
 {

  switch ( currentCycleState )
  {
   case NONE:
    SwitchLightOn ( RED );
    currentCycleState = RED;
    nextCycleTime = Time.time + 2f;
    break;
 
   case RED:
    SwitchLightOn ( ORANGE );
    currentCycleState = ORANGE;
    nextCycleTime = Time.time + 2f;
    break;
 
   case ORANGE:
    SwitchLightOn ( GREEN );
    currentCycleState = GREEN;
    nextCycleTime = Time.time + 2f;
    break;
 
   case GREEN:
    SwitchLightOn ( BLUE );
    currentCycleState = BLUE;
    nextCycleTime = Time.time + 2f;
    break;
 
   case BLUE:
    currentCycleState = NONE;
    enableCyclingOfLights = false;
    counter = 0;
    break;
 
 
  }


 }

 void UpdateLightsStates ( int count )
 {
  switch ( count )
  {
   case 2:
    SwitchLightOn ( RED );
    break;
 
   case 4:
    SwitchLightOn ( ORANGE );
    break;
 
   case 7:
    SwitchLightOn ( GREEN );
    break;
 
   case 9:
    SwitchLightOn ( BLUE );
    break;
 
   case 10:
    enableCyclingOfLights = true;
 
    break;
  }



 }

 private const int NONE = 0;
 private const int RED = 1;
 private const int ORANGE = 2;
 private const int GREEN = 3;
 private const int BLUE = 4;

 void SwitchLightOn( int lightToSwitchOn )
 {
  switch ( lightToSwitchOn )
  {
   case RED:
    redLight.enabled = true;
    orangeLight.enabled = false;
    greenLight.enabled = false;
    blueLight.enabled = false;
    break;
 
   case ORANGE:
    orangeLight.enabled = true;
    redLight.enabled = false;
    greenLight.enabled = false;
    blueLight.enabled = false;
    break;
 
   case GREEN:
    greenLight.enabled = true;
    orangeLight.enabled = false;
    redLight.enabled = false;
    blueLight.enabled = false;
    break;
 
   case BLUE:
    blueLight.enabled = true;
    greenLight.enabled = false;
    orangeLight.enabled = false;
    redLight.enabled = false;
    break;
 
 
 
  default:
   //catch all condition
   blueLight.enabled = false;
   greenLight.enabled = false;
   orangeLight.enabled = false;
   redLight.enabled = false;
   break;
 
  }

 }
}

Here is some code Toop and I were thinking of using to make the scene change colour. When you hit the plant, it will make everything that colour.