Stop the lasers from keep bouncing

So I'm using the script found here: Unity Raycast Reflection but I can't get it to stop bouncing. I've tried using a simple:

 if(lastHit != "OutWall") {
     //the reflection direction is the reflection of the current ray direction flipped at the hit normal
     inDirection = Vector3.Reflect(ray.direction,hit.normal);
     //cast the reflected ray, using the hit point as the origin and the reflected direction as the direction
     ray = new Ray(hit.point,inDirection);
 
     //Draw the normal - can only be seen at the Scene tab, for debugging purposes
     Debug.DrawRay (hit.point, hit.normal*3, Color.blue);
     //represent the ray using a line that can only be viewed at the scene tab
     Debug.DrawRay (hit.point, inDirection*100, Color.magenta);
 
     //Print the name of the object the cast ray has hit, at the console
     Debug.Log("Object name: " + hit.transform.name);
     
     //save the last hit object
     lastHit = hit.transform.name;
 
     //if the number of reflections is set to 1
     if(nReflections==1)
     {
         //add a new vertex to the line renderer
         lineRenderer.SetVertexCount(++nPoints); 
     }
 
     //set the position of the next vertex at the line renderer to be the same as the hit point
     lineRenderer.SetPosition(i+1,hit.point);
 }

But adding my lastHit variable doesn't seem to be working.

Could you guys take a look at his script and determine where I should place my "If OutWall is hit then don't continue bouncing" if statement

Thanks so much for your help!