create image, then put it in unity and drag that green lines like on pic2, finally change its bottom border position like on pic3 with routine/Tween with speed * Random.Range(.35f, 1f) or something like it; Done.
create image, then put it in unity and drag that green lines like on pic2, finally change its bottom border position like on pic3 with routine/Tween with speed * Random.Range(.35f, 1f) or something like it; Done.