js(9,30): UCE0001: ';' expected. Insert a semicolon at the end.

Hi, I'm new to unity and trying to make a game (From YouTube) but when ever I reach at scripting, I always have some sort of problem. When I was scripting today, when I saved it, it gave me several errors and I clear all of them but can't find a solution for this one. Where to put that semicolon, I already have putted that in the end and the location which the error is showing, I can't put there, if I do, then they gave 2 or 3 new errors. Please help me! Here's my script:

 #pragma strict
 
 var rotationSpeed = 100;
 
 function Update ()
 {
     var rotation : float = Input.GetAxis ("Horizontal") * rotationSpeed;
     rotation *= Time.deltaTime;
      GetComponent.<Rigidbody>rigidbody.AddRelativeTorque (Vector3.back * rotation);
 }