Unity is freezing and I cannot figure out why

I am making a card game and when I hit play unity is freezing. Could you please help me find what in my code is causing this? Thanks! using UnityEngine; using System.Collections;

 public class Deck : MonoBehaviour {
     public GameObject Card;
     public GameObject[] Cards;
     public float deckSize;
     private int decklength;
     public float offset;
     private string[] cardNames = {"aC","2C","3C","4C","5C","6C","7C","8C","9C","10C","jC","qC","kC","aD","2D","3D","4D","5D","6D","7D",
                                 "8D","9D","10D","jD","qD","kD","aH","2H","3H","4H","5H","6H","7H","8H","9H","10H","jH","qH","kH",
                                 "aS","2S","3S","4S","5S","6S","7S","8S","9S","10S","jS","qS","kS"};
 
     private float startTime;
     private float journeyLength;
     public float speed = 1.0f;
     // Use this for initialization
     void Start () {
         decklength = Mathf.RoundToInt(deckSize); 
         Cards = new GameObject[decklength]; 
         offset =  1 / deckSize;
 
         for (int i = 0 ; i < decklength; i++)
         {
             GameObject go = Instantiate(Card,transform.position + new Vector3(0, i*offset, 0),transform.rotation) as GameObject;
             Cards[i] = go;
             Cards[i].transform.parent = transform;
             Cards[i].name = cardNames[i];
         }
 
         Shuffle();
     }
     
     // Update is called once per frame
     void Update () {
     
     }
     void Shuffle ()
     {
         for (int i = 0 ; i < decklength; i++)
         {
             GameObject tmp = Cards[i];
             int r = Random.Range(i,decklength);
             Cards[i] = Cards[r];
             Cards[r] = tmp;
         }
 
         for (int i = 0 ; i < decklength; i++)
         {
             Vector3 pos1 = Cards[i].transform.position; 
             Vector3 pos2 = transform.position + new Vector3(0, i*offset, 0);
             startTime = Time.time;
             journeyLength = Vector3.Distance(pos1, pos2);
 
             while(Cards[i].transform.position != pos2)
             {
                 float distCovered = (Time.time - startTime) * speed;
                 float fracJourney = distCovered/journeyLength;
                 Cards[i].transform.position = Vector3.Lerp(pos1, pos2, fracJourney);
             }
 
         }
     }
 }