Unity android button and Time.timescale problems

Hi. I`m making a car game and i have problems with the pause button meaning , i use Time.timescale=0 to pause but i also use Time.timescale=0 on diffrent game events such as collisions and countdowns that end the game.This script contains both the pause button components and the game ending situations.So the problem is that each fragment works independent meaning that the pause button works but when i add the other fragment it stops working and viceversa. I `m really stuck on this and cant figure a workaround, i would really like some help on this.thanks in advance.

 var x:float=2560;
  var y:float=1600;
  var TextStyle = new GUIStyle();
  var TextStyle2 = new GUIStyle();
  var TextStyle3 = new GUIStyle();
  var time : float;
  static var timeScale : float; 
  var image : Texture; //fuel texture
  var image2 : Texture; //gameover texture
  var paused : boolean = false;
  var btnTexture : Texture;
 function OnGUI ()
 {       
  GUI.matrix = Matrix4x4.TRS(Vector3.zero, Quaternion.identity, Vector3(1.0*Screen.width/x, 1.0*Screen.height/y, 1.0));//resolution scale
 
  var Cooldown : String = "Fuel "+(60-Mathf.Round(Time.time)+CarsCOLLISION.Timer);
     GUI.DrawTexture(new Rect(100, 1250, 340, 340), image); //fuel 
     GUI.Label (Rect (1500, 20, 1000, 100),"Score "+(Mathf.Round(Time.time)*7+CarsCOLLISION.Score), TextStyle);//score
     GUI.Label (Rect (120, 1200, 2560, 1600),"Fuel "+(60-Mathf.Round(Time.time)+CarsCOLLISION.Timer), TextStyle2);//countdown timer
 
  
 
  if(Cooldown == "Fuel "+0)// end game when fuel is empty
   { 
      GUI.DrawTexture(new Rect(350, 300, 1920, 1080), image2);//post image game over
       Time.timeScale = 0;
 }
  else { Time.timeScale = 1;
       }
 
  if (GameObject.Find("player car") == null)// end game on collision with police
  { 
    GUI.DrawTexture(new Rect(350, 300, 1920, 1080), image2); //post image game over
    Time.timeScale = 0;
  }
 
 if (GUI.Button(Rect(10,10,100,100),btnTexture)&& paused == false)//pause button
 { Time.timeScale = 0;
   paused =true;
 }
 if (GUI.Button(Rect(40,40,100,100),btnTexture)&& paused == true)//resume button
 {  Time.timeScale = 1;
    paused =false;
 }
 
 
 
 
 }