Multiple objects to one excecute method

Hey guys, I've got a problem. I have a script which is gonna place some stuff on the surface which is working. The problem is that I don't know how i can switch between the objects which are gonna be placed by pressing a number, say 1 for cube or 2 for cylinder.

Here is the code:

 import System.Collections.Generic;
 var TowerPrefab : Transform;
 
 var Object1 : Transform;
 var Object2 : Transform;
 var prefabTransforms : List.<Transform>;
 
 function Update () {
         if (Input.GetKeyDown ("1")){
             prefabTransforms.Add(Object1);   
             Debug.Log("Pressed 1, outputs Cube");}
             
         if (Input.GetKeyDown ("2")){
             PickedObject.Add(Object2);   
             Debug.Log("Pressed 2, outputs Cylinder");}
             
             var Objects = prefabTransforms;
             
     }
 
 function OnMouseUp () 
 
 {
     var Eye : GameObject = GameObject.Find("Eye");
     var thisItem = List[i];     
 
     var ray = Eye.camera.ScreenPointToRay (Input.mousePosition); 
 
     var hit : RaycastHit; 
 
     if (Physics.Raycast (ray, hit, 2000)) 
 
     { 
 
         Instantiate(Objects, hit.point, Quaternion.identity); 
         Debug.Log("Prefab cloned!");
 
 }   
 
  
 
 }

I understood I'd use list although I don't have a clue how to go from here.. Thanks in advance :)