I want to alternate between gameobjects by using transforms in c#

I have an error CS0176 for some reason and I don't understand why plz help thanks.

code

using UnityEngine; using System.Collections;

public class MoveMent : MonoBehaviour {

 public float moveSpeed; 
 public float jumpHeight;
 public Transform groundCheck;
 public float groundCheckRadius;
 public LayerMask whatIsGround;
 private bool grounded;
 private bool doubleJumped;

// Game Objects/Transforms I want to alternate.

     public GameObject FirePoint;                      
     public GameObject FirePoint2;                      
     public Transform firePoint;


 private SpriteRenderer mySpriteRenderer;
 public GameObject bullet;


 // Use this for initialization
 void Start () {
 
 }

 void FixedUpdate() {
     grounded = Physics2D.OverlapCircle (groundCheck.position, groundCheckRadius, whatIsGround);
 }


 void Update () {
     if (grounded)
        doubleJumped = false;


     if (Input.GetKeyDown (KeyCode.UpArrow) && grounded) {
         GetComponent<Rigidbody2D>().velocity = new Vector2(GetComponent<Rigidbody2D>().velocity.x, jumpHeight); }

     if (Input.GetKeyDown (KeyCode.UpArrow) && !doubleJumped && !grounded) {
         GetComponent<Rigidbody2D>().velocity = new Vector2(GetComponent<Rigidbody2D>().velocity.x, jumpHeight);
         doubleJumped = true; }
     

     if (Input.GetKey (KeyCode.LeftArrow)) {
         GetComponent<Rigidbody2D>().velocity = new Vector2(-moveSpeed, GetComponent<Rigidbody2D>().velocity.y); 

     
     
     }
         
     if (Input.GetKey (KeyCode.RightArrow)) {
         GetComponent<Rigidbody2D> ().velocity = new Vector2 (moveSpeed, GetComponent<Rigidbody2D> ().velocity.y); 


     }

     if (Input.GetKey (KeyCode.LeftArrow)) {
         mySpriteRenderer.flipX = true;
     
     }

     if (Input.GetKey (KeyCode.RightArrow)) {
         mySpriteRenderer.flipX = false;

     }
     
     if (Input.GetKeyDown(KeyCode.Space)) 
     {
         Instantiate (bullet, firePoint.position, firePoint.rotation);
     }


     //  Error Here, <----------------------------> 

     if (Input.GetKey (KeyCode.LeftArrow)) {
         Transform firePoint = gameObject.Find("FirePoint2");
     }


     if (Input.GetKey (KeyCode.RightArrow)){
         Transform firePoint = gameObject.Find("FirePoint");
             
                     
     }
 // <-----------------------------------> End of error
 
 }

 private void Awake(){
     mySpriteRenderer = GetComponent<SpriteRenderer>();
 
 
 
 
 }

}