Pause and Play buttons don't work

I am a newby and have been on this for a few days…Can anyone tell me what is wrong? Thank you so much for your consideration.

var goGlow : GameObject;


function Start(){
	
	stopGlow = GameObject.FindWithTag("StopGlow");	
	stopGlow.renderer.material.color.a = 0f;
	goGlow = GameObject.FindWithTag("GoGlow");
	goGlow.renderer.material.color.a = 1f;
}
   

function Update()
{
	if ( Input.GetMouseButtonDown(0) &&  GameObject.FindWithTag == "StopSign"
		&& Time.timeScale==1)
	{  
		Time.timeScale = 0;	
		stopGlow.renderer.material.color.a = 1f;	
		goGlow.renderer.material.color.a = 0f;
		print("im here");
	}
	else if(Input.GetMouseButtonDown(0) &&  GameObject.FindWithTag == "GoSign" 
		&& Time.timeScale ==0)
	{
		Time.timeScale = 1;
		stopGlow.renderer.material.color.a = 0f;	
		goGlow.renderer.material.color.a = 1f;
	}	
   	 print(Time.timeScale);   	
}

Yes you can use the same camera.
There are literally thousands of examples on using a raycast, here’s one

roughly…

input.getmousebuttondown
raycast (mousepost)
if(raycast aint null)
look at hit.transform
if it's stop, pause game
if if's go, unpause game