HELP IM NEW AND THIS KEEPS POPPING UP

SO im trying to test this

var Rotationspeed = 100;

function Update () {

var rotation : float = Input.GetAxis ("Horizontal") * Rotationspeed;
rotation *= Time.deltaTime;
UnityEngine.Rigidbody();
Rigidbody.AddRelativeTorque (Vector3.back * rotation);

BUT I GOT LIKE ONLY 1 FREAKIN ERROR AND ITS FUSTRATING ME.

it says an instance of type ‘UnityEngine.Rigidbody’ is required to acess non static memeber ‘addrelevativetorque’

HELP

ive literally got rid of every other error but that one

@Headkill1
Try this

     var rb: Rigidbody;
    
        function Start() {
        	rb = GetComponent.<Rigidbody>();
        }
        var Rotationspeed = 100;
        
        function Update () {
        
         var rotation : float = Input.GetAxis ("Horizontal") * Rotationspeed;
         rotation *= Time.deltaTime;
         rb.AddRelativeTorque (Vector3.back * rotation);

}

From Unity - Scripting API: Rigidbody.AddRelativeTorque