columns wont pause on mouseclick

Im making a game where there are three columns moving either up or down. I want one of the columns pause for a second when I click on it, however it is not working. Here is my code:

and help would be amazing!

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

public class Main : MonoBehaviour {

 public static float Range;

 

 public GameObject[] squaresDownArray;
 public GameObject[] squaresUpArray;
 public GameObject square;




 int index;

 public Color[] colourArray;


 public Vector2 leftSpawnPosition;
 public Vector2 midSpawnPosition;
 public Vector2 rightSpawnPosition;

 public float spawnTimer;
 private float spawnCounter;

 private int squareIndexCounter;

 public bool leftColumnOn;
 public bool midColumnOn;
 public bool rightColumnOn;





 // Use this for initialization
 void Start ()
 {
     
         




     InvokeRepeating ("TimerTick", 0, 1);


 }
 
 // Update is called once per frame
 void Update ()
 {
     spawnCounter += Time.deltaTime;

 



     
 }


 public void TimerTick ()
 {
     /*

     if (spawnCounter >= spawnTimer) {
         GameObject lSquare = Instantiate (square, leftSpawnPosition, Quaternion.identity);
         lSquare.tag = "SquareLeft";
         //lSquare.GetComponent<SpriteRenderer> ().color = colourArray [squareIndexCounter];
         lSquare.GetComponent<MeshRenderer> ().materials [0].color = colourArray [Random.Range (0, colourArray.Length)];

         squareIndexCounter++;
         if (squareIndexCounter >= colourArray.Length) {
             squareIndexCounter = 0;
         }




         GameObject mSquare = Instantiate (square, midSpawnPosition, Quaternion.identity);
         mSquare.tag = "SquareMid";
         //mSquare.GetComponent<SpriteRenderer> ().color = colourArray [squareIndexCounter];
         mSquare.GetComponent<MeshRenderer> ().materials [0].color = colourArray [Random.Range (0, colourArray.Length)];

         squareIndexCounter++;
         if (squareIndexCounter >= colourArray.Length) {
             squareIndexCounter = 0;
         }

     

     
         GameObject rSquare = Instantiate (square, rightSpawnPosition, Quaternion.identity);
         rSquare.tag = "SquareRight";
         //rSquare.GetComponent<SpriteRenderer> ().color = colourArray [squareIndexCounter];
         rSquare.GetComponent<MeshRenderer> ().materials [0].color = colourArray [Random.Range (0, colourArray.Length)];

         squareIndexCounter++;
         if (squareIndexCounter >= colourArray.Length) {
             squareIndexCounter = 0;
         }
         }

*/

     if (leftColumnOn) {
         if (spawnCounter >= spawnTimer) {
             GameObject lSquare = Instantiate (square, leftSpawnPosition, Quaternion.identity);
             lSquare.tag = "SquareLeft";
             //lSquare.GetComponent<SpriteRenderer> ().color = colourArray [squareIndexCounter];
             lSquare.GetComponent<MeshRenderer> ().materials [0].color = colourArray [Random.Range (0, colourArray.Length)];

             squareIndexCounter++;
             if (squareIndexCounter >= colourArray.Length) {
                 squareIndexCounter = 0;
             }

             foreach (GameObject square in GameObject.FindGameObjectsWithTag("SquareLeft")) {
                 square.GetComponent<SquareScript> ().Move ("down");

             }


         }


     }
     if (midColumnOn) {
         if (spawnCounter >= spawnTimer) {
             GameObject mSquare = Instantiate (square, midSpawnPosition, Quaternion.identity);
             mSquare.tag = "SquareMid";
             //mSquare.GetComponent<SpriteRenderer> ().color = colourArray [squareIndexCounter];
             mSquare.GetComponent<MeshRenderer> ().materials [0].color = colourArray [Random.Range (0, colourArray.Length)];

             squareIndexCounter++;
             if (squareIndexCounter >= colourArray.Length) {
                 squareIndexCounter = 0;
             }

             foreach (GameObject square in GameObject.FindGameObjectsWithTag("SquareMid")) {
                 square.GetComponent<SquareScript> ().Move ("up");


             }

     
         }
     }
     if (rightColumnOn) {
         if (spawnCounter >= spawnTimer) {
             GameObject rSquare = Instantiate (square, rightSpawnPosition, Quaternion.identity);
             rSquare.tag = "SquareRight";
             //rSquare.GetComponent<SpriteRenderer> ().color = colourArray [squareIndexCounter];
             rSquare.GetComponent<MeshRenderer> ().materials [0].color = colourArray [Random.Range (0, colourArray.Length)];

             squareIndexCounter++;
             if (squareIndexCounter >= colourArray.Length) {
                 squareIndexCounter = 0;
             }


             foreach (GameObject square in GameObject.FindGameObjectsWithTag("SquareRight")) {
                 square.GetComponent<SquareScript> ().Move ("down");


             }
         }
     }

                 leftColumnOn = true;
                 midColumnOn = true;
                 rightColumnOn = true; 


         


             }
         

     

 }