Unity2d NullReferenceException

Hi, here is the portion of my script that is causing the compllier errors Nullreferenceexception. I’m at a loss to why this is happening.
var moveSpeed : float = 10F;

function Update()
{

Movement();

}
function Movement()
{

if(Input.GetKey (KeyCode.D)){
{
transform.Translate(Vector2.right * 4f * Time.deltaTime0);
}
}
}

looks like Time.deltaTime0 should just be Time.deltaTime