Keep getting "error CS0116: A namespace can only contain types and namespace declarations"

Im very new to Unity so when "error CS0116: A namespace can only contain types and namespace declarations " keeps coming up I have no clue what to do. I checked the My scripts and they say there are no errors. so perhaps You could help?

(If I'm writing the question wrong I apologize.)

SCRIPT

 using UnityEngine;
 
 /// 
 /// Player controller and behavior
 /// 
 public class PlayerScript : MonoBehaviour
 {
     /// <summary>
     /// 1 - The speed of the ship
     /// </summary>
     public Vector2 speed = new Vector2(50, 50);
     
     // 2 - Store the movement
     private Vector2 movement;
     
     void Update()
     {
         // 3 - Retrieve axis information
         float inputX = Input.GetAxis("Horizontal");
         float inputY = Input.GetAxis("Vertical");
         
         // 4 - Movement per direction
         movement = new Vector2(
             speed.x * inputX,
             speed.y * inputY);
         
     }
     
     void FixedUpdate()
     {
         // 5 - Move the game object
         GetComponent<Rigidbody2D>().velocity = movement;
     }
 
 }
 
 void Update()
 {
     // ...
     
     // 5 - Shooting
     bool shoot = Input.GetButtonDown("Fire1");
     shoot |= Input.GetButtonDown("Fire2");
     // Careful: For Mac users, ctrl + arrow is a bad idea
     
     if (shoot)
     {
         WeaponScript weapon = GetComponent<WeaponScript>();
         if (weapon != null)
         {
             // false because the player is not an enemy
             weapon.Attack(false);
         }
     }
     
     // ...
 }