how to make UI Image inside Scroll Rect (ScrollRect) autoscroll?

My hierarchy looks like this:

Canvas->Panel->ScrollRect (with mask)->Image

Scroll Rect is set to: Vertical (only) and Movement Type is set to: Clamped.

What I’m trying to achieve is to force that image in some kind slow and looped motion until touched.

looped motion is a dream. Right now I can’t even make it move.

using UnityEngine;
using System.Collections;

public class scroll : MonoBehaviour {
	public float speed = 0.5f;
	public float offset = 510;
	void Start ()

	void Update ()
		this.offset -= Time.deltaTime * this.speed;

I can see offset decreasing during the “play mode” but Image is not moving even a little.
Can anybody please help me or point into the right direction? Is it even possible?

It could be also useful for creating Scroll Rect with ie. heroes/cars to choose from etc. So I think that many devs would benefit from this question.

use scrollScrollRect.verticalNormalizedPosition

with Mathf.Lerp to change the position between 1 to 0

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

public class AutoScrollRect: MonoBehaviour {

    public ScrollRect myScrollRect;
    public float scrollTime;
    public static WaitForSeconds P3 = new WaitForSeconds(0.3f); 

    void Start() {
        StartCoroutine(AutoScroll(myScrollRect, 1, 0, scrollTime));

    IEnumerator AutoScroll(ScrollRect srollRect, float startPosition, float endPosition, float duration) {
        yield return P3;
        float t0 = 0.0f;
        while (t0 < 1.0f) {
            t0 += Time.deltaTime / duration;
            srollRect.verticalNormalizedPosition = Mathf.Lerp(startPosition, endPosition,  t0);
            yield return null;