,How To make a cube move

,So i just got unity and i want to make a cube move. i got a plane and a cube. Any coding i need to do?

Also, can anyone tell me why it says, " The referenced script on this behavior is missing?"

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

public class MoveScript : MonoBehaviour {


    public GameObject Cube; //The Cube

	// Update is called once per frame
	void Update () {

        Cube.transform.position += new Vector3(1f, 0f, 0f);

       

        //if you want to make it so it is whatever the script is attatched to, instead of "Cube.transform.position"; Do gameObject.transform.position
        //Also instead of 1f, 0f, 0f
        //You can customize it to whatever you want (x,y,z)
        //If you do decimals do "f" don't just do "5.4" do "5.4f"
        //This is in the update function, it will happen per frame. Feel free to have it in any other function :)
        

	}
}

thank you @JeffHardddyyy