API update Renderer error assistance!

I have been looking for a thread that would help with texture offset on an object, but I have come across something that is not in the current API.

public class ScrollScript : MonoBehaviour {
public float speed = 0;

void Update () {
renderer.material.mainTextureOffset = new Vector2 (Time.time*speed,0f);
}
}


I have attempted to change this to

public class ScrollScript : MonoBehaviour {
public float speed = 0;
static Renderer rend = GetComponent <Renderer>();
// Use this for initialization
void Start () {

}

// Update is called once per frame
void Update () {
rend.material.mainTextureOffset = new Vector2 (Time.time*speed,0f);
}
}

But I am getting An object reference is required for a non-static field, method, or property 'UnityEngine.Component.GetComponent<T>()' error.

New to scripting so I feel like I am missing something simple!