Platform move left and right randomly

Hi, I am pretty new to Unity and I am trying to make a platform jumping game. I got this script working as it should from a Youtube video but I wanted to make the platform move randomly because I have multiple platforms that gonna spawn when I start the game. So basically when the platform spawn 1 should go from left to right and the other should go from right to left.

     public Transform pos1, pos2;
     public float speed;
     public Transform startPos;
  
     Vector2 nextPos;
  
     // Start is called before the first frame update
     void Start()
     {
         nextPos = startPos.position;
     }
  
     // Update is called once per frame
     void Update()
     {
         if(transform.position == pos1.position)
         {
             nextPos = pos2.position;
         }
         if(transform.position == pos2.position)
         {
             nextPos = pos1.position;
         }
         transform.position = Vector2.MoveTowards(transform.position, nextPos, speed * Time.deltaTime);
     }