change GUIText in script how?

I’m using a Canvas and a text component (See attached file)

How do i though script make it change to like. Time.deltaTime?

You can do something like this, place this on the text component:

using UnityEngine;
using UnityEngine.UI;
using System.Collections;

public class TextTest : MonoBehaviour {
    void Update () {
        GetComponent<Text>().text = Time.deltaTime.ToString();
    }
}