How to create an array of Transforms

I have a game object at each corner of my plane. I have an AI script that will send enemy game objects to my player object. When a collision happens I have the enemy stop and then temporarily go towards a corner. But I want the enemy to randomly go to 1 of the four corners.

I know I need to do this by hold the corner game objects in an array and then referencing the transform of one of those objects. However I am very rusty with arrays. Can you give me an example of how I can create an array of gameobject transforms and how I can reference them?

 var corner1 : Transform;
 var corner2 : Transform;
 var corner3 : Transform;
 var corner4 : Transform;
 var cornerOne : GameObject;
 var cornerTwo : GameObject;
 var cornerThree : GameObject;
 var cornerFour : GameObject;
 
 var targetTrans : Transform;
 
 function Start()
 {
 cornerOne= GameObject.FindWithTag ("corner1");
 cornerTwo= GameObject.FindWithTag ("corner2");
 cornerThree= GameObject.FindWithTag ("corner3");
 cornerFour= GameObject.FindWithTag ("corner4");
 corner1 = cornerOne.transform;
 corner2 = cornerTwo.transform;
 corner3 = cornerThree.transform;
 corner4 = cornerFour.transform;
 }
 
 function Update () 
 {
  targetTrans = this.transform;
 }