How to Move an enemy left? My script broke...

The script to move my enemy "left" worked yesterday on my work PC.
Opening to today on laptop and its spits out compiler errors?

//GetComponent<Rigidbody2D> ().velocity = Vector2.left;
Is vector2.left not supported in certain versions of unity?

How can I modify this script below to move my enemy left right now it just moves right?
GetComponent<Rigidbody2D>().velocity = new Vector2 (velocity, GetComponent<Rigidbody2D>().velocity.y);

Is there a better way to move an enemy across the screen towards left? In fixed update?

Thanks

 

negative velocity?
GetComponent<Rigidbody2D>().velocity = new Vector2 (-velocity, GetComponent<Rigidbody2D>().velocity.y)

What error do you get when trying to do Vector2.left?

 

- velocity did not work
Am i missing a using statement for vector2 left?

here is the error message i get.
Assets/scripts/MoveEnemy.cs(14,65): error CS0117: `UnityEngine.Vector2' does not contain a definition for `left'

 

Problem solved

GetComponent<Rigidbody2D> ().velocity = -Vector2.right;

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class MoveEnemy : MonoBehaviour {
5.     public GameObject Player;
6.     public float velocity = -1.0f;
7.     void Start () {
8.  
9.     }
10.  
11.     // Update is called once per frame
12.     void FixedUpdate () {
13.  
14.         GetComponent<Rigidbody2D> ().velocity = -Vector2.right;
15.    
16.     }
17.     void OnTriggerEnter(Collider other){
18.         if(other.gameObject.CompareTag("Player")){
19.             Destroy (Player);
20.             Debug.Log ("Hit");
21.  
22.         }
23.  
24.     }
25. }