var speed : float = 3.0;
    var rotateSpeed : float = 3.0;
    function Update () {
        var controller : CharacterController = GetComponent(CharacterController);
        // Rotate around y - axis
        transform.Rotate(0, Input.GetAxis ("Horizontal") * rotateSpeed, 0);
        
        // Move forward / backward
        var forward : Vector3 = transform.TransformDirection(Vector3.forward);
        var curSpeed : float = speed * Input.GetAxis ("Vertical");
        controller.SimpleMove(forward * curSpeed);
    }
    @script RequireComponent(CharacterController)

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(CharacterController))]
public class example : MonoBehaviour {
    public float speed = 3.0F;
    public float rotateSpeed = 3.0F;
    void Update() {
        CharacterController controller = GetComponent<CharacterController>();
        transform.Rotate(0, Input.GetAxis("Horizontal") * rotateSpeed, 0);
        Vector3 forward = transform.TransformDirection(Vector3.forward);
        float curSpeed = speed * Input.GetAxis("Vertical");
        controller.SimpleMove(forward * curSpeed);
    }
}

import UnityEngine
import System.Collections

[RequireComponent(CharacterController)]
class example(MonoBehaviour):

    public speed as single = 3.0F

    public rotateSpeed as single = 3.0F

    def Update():
        controller as CharacterController = GetComponent[of CharacterController]()
        transform.Rotate(0, (Input.GetAxis('Horizontal') * rotateSpeed), 0)
        forward as Vector3 = transform.TransformDirection(Vector3.forward)
        curSpeed as single = (speed * Input.GetAxis('Vertical'))
        controller.SimpleMove((forward * curSpeed))