Small component for Unity3d that is responsible for looping texture on the gameobject. The gameobject that has uses this component needs a renderer with material that has a texture you want to use.

TextureOffsetController.cs

using UnityEngine;

public class TextureOffsetController : MonoBehaviour
{
    public float speed = 0.05f;

    private float position = 0.0f;

    void Update()
    {
        position += speed;
        if (position > 1.0f)
        {
            position -= 1.0f;
        }

        GetComponent<Renderer>().material.mainTextureOffset = new Vector2(0.0f, position);
    }
}