attach to an object a tooltip with the sign "Follow me!" make the tooltip always face the player

public void FollowMe(GameObject target)
{
  GameObject tooltip = new GameObject("Tooltip");
  tooltip.AddComponent<TextMesh>();
  tooltip.transform.position = target.transform.position + new Vector3(0f, 1.2f, 0f);
  tooltip.transform.rotation = Quaternion.Euler(90f, 0f, 0f);
  tooltip.transform.parent = target.transform;
  tooltip.GetComponent<TextMesh>().text = "Follow Me!";
}

FollowMe(player);