float  speed  = 6.0f;

    float jumpSpeed  = 8.0f;

    float gravity  = 20.0f;

    private Vector3 moveDirection = Vector3.zero;

    void Start()

    {

       // gameObject.rigidbody = false;

    }

    void Update()

    {

        CharacterController controller = GetComponent<CharacterController>();

        if(controller.isGrounded)

        {

	        moveDirection =new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical")); //Allows for player input

	        moveDirection = transform.TransformDirection(moveDirection); //How to move

	        moveDirection *= speed; //How fast to move

	        if(Input.GetButton("Jump"))

	        {

		        moveDirection.y = jumpSpeed;

	        }

        }

        //Apply gravity

        moveDirection.y -= gravity * Time.deltaTime;

        //Move the controller

        controller.Move(moveDirection * Time.deltaTime);	

    }