error CS1022 help

Getting Started
1

Ok so basically i am making a 2d game, and im new to unity.
So what i want to do is to make the object move when i press a speicific key.
This is my script

using System.Collections;
using System.Collections.Generic;
using UnityEngine;





   public class Movement : MonoBehaviour { }
   public Rigidbody rb;
   public GameObject Sphere;





    // Update is called once per frame
{void FixedUpdate()
    {
    if (Input.GetKey("d"))
        sosis.AddForce(1, 0, 0);
    if (Input.GetKey("a"))
        sosis.AddForce(-1, 0, 0);
    }
}

the problem is at the curly brackets before the word “void” and the last curly brackets. Its says “Type or namespace definition, or end of file expected”
Please help

2

All of your code is outside of the Movement class.
Place all of this…

 public Rigidbody rb;
   public GameObject Sphere;
    // Update is called once per frame
{void FixedUpdate()
    {
    if (Input.GetKey("d"))
        sosis.AddForce(1, 0, 0);
    if (Input.GetKey("a"))
        sosis.AddForce(-1, 0, 0);
    }
}

…Between the curly braces of the Movement class.
And then remove that extra curly brace before FixedUpdate.

You may also want to start with some beginner scripting tutorials: