Errors CS1513 and CS1022 - Need help.

I’m just getting started with Unity and I don’t know why I’m getting these errors:

Assets\PlayerMovementScript.cs(15,19): error CS1513: } expected
Assets\PlayerMovementScript.cs(48,1): error CS1022: Type or namespace definition, or end-of-file expected

I’ve double-checked all the curly brackets and it doesn’t seem wrong to me. Any clue of what could be happening here? I’m sorry if it’s a dumb question, but I can’t find what the problem is. Code:

using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    public class PlayerMovementScript : MonoBehaviour {
        public KeyCode upKey = KeyCode.W;
        public KeyCode downKey = KeyCode.S;
        public KeyCode rightKey = KeyCode.D;
        public KeyCode leftKey = KeyCode.A;
        public float speed = 4.0f;
        public Vector3 pos = player.transform.position;
        void Start() {	
        	public GameObject player = GameObject.Find("Player");
        void Update() {
        	if (Input.GetKeyDown(upKey))
           		pos.y += speed * Time.deltaTime;
        	if (Input.GetKeyDown(downKey))
           		pos.y -= speed * Time.deltaTime;
        	if (Input.GetKeyDown(rightKey))
           		pos.x += speed * Time.deltaTime;
        	if (Input.GetKeyDown(leftKey))
           		pos.x -= speed * Time.deltaTime;
            player.transform.position = pos;

Thanks in advance!

You can’t define player in Start() in the way that it’s written. Change to the following:

public GameObject player;
public Vector3 pos;

void Start()
    player = GameObject.Find("Player");
    pos = player.transform.position;