I'm using the following script to draw a crosshair on the screen that spreads further apart when the player holds the Fire1 button down. The script is as follows:

pragma strict

 var drawCrosshair = true;
      
 var crosshairColor = Color.white;
      
 var width : float = 3;
 var height : float = 35;
      
 class spreading{
 var spread = 20.0;
 var maxSpread = 60.0;
 var minSpread = 20.0;
 var spreadPerSecond = 30.0;
 var decreasePerSecond = 5.0;
 var maxShrink = 5;
 var minShrink = 0;
 
 }
      
 var spread : spreading;
      
 private var tex : Texture2D;
      
 private var lineStyle : GUIStyle;
      
 function Awake (){
     tex = Texture2D(1,1);
      
     SetColor(tex, crosshairColor);
      
         lineStyle = GUIStyle();
         lineStyle.normal.background = tex;
     }
      
 function Update (){
     if(Input.GetButton("Fire1")){
     spread.spread += spread.spreadPerSecond * Time.deltaTime;
         Fire();
             }else{
                 spread.spread -= spread.decreasePerSecond * Time.deltaTime;
                     }
                     
      
     spread.spread = Mathf.Clamp(spread.spread, spread.minSpread, spread.maxSpread);
     
     if(Input.GetButton("Crouch")){
     spread.spread -= spread.spreadPerSecond * Time.deltaTime;
         Crouch();
             
                 
     spread.spread = Mathf.Clamp(spread.spread, spread.minShrink, spread.maxShrink);
     
     }
     
     
     }
       
         
 function OnGUI (){
     var centerPoint = Vector2(Screen.width / 2, Screen.height / 2);
      
     if(drawCrosshair){
         GUI.Box(Rect(centerPoint.x - width / 2, centerPoint.y - (height + spread.spread), width, height), "", lineStyle);
         GUI.Box(Rect(centerPoint.x - width / 2, centerPoint.y + spread.spread, width, height), "", lineStyle);
         GUI.Box(Rect(centerPoint.x + spread.spread, (centerPoint.y - width / 2), height , width), "", lineStyle);
         GUI.Box(Rect(centerPoint.x - (height + spread.spread), (centerPoint.y - width / 2), height , width), "", lineStyle);
         }
     }
      
 function Fire(){
 
     }
     
 function Crouch(){
 
 }
      
 
 function SetColor(myTexture : Texture2D, myColor : Color){
         for (var y : int = 0; y < myTexture.height; ++y){
         for (var x : int = 0; x < myTexture.width; ++x){
             myTexture.SetPixel(x, y, myColor);
             }
         }
      
         myTexture.Apply();
     }

Is it possible to use the spread variables to determine the area within which the ray casts randomly and is it possible to have the raycasting in a separate script?

P.S I'm still pretty new to coding so sorry if this has a very simple solution.