void AddTail()
{
SnakeTail tail = Instantiate(tailPrefab, Vector3.zero, Quaternion.identity) as SnakeTail;
tail.SetColor(color);
tail.SetWidth(width);
tail.SetOffset((int)(width * 7)); // was 8
tail.transform.parent = map.transform; // optional, for convenience
snakeTails.Add(tail);
}