public TimedColourRangeSet(TimeRange timeRange, DualColour start, DualColour mid, DualColour end)
{
this.timeRange = timeRange;
this.start = start;
this.mid = mid;
this.end = end;
}
// Update is called once per frame
protected override void UpdateValues(DualColour colours)
{
gameObject.light.color = Color.Lerp (colours.lower, colours.upper, skyColourPosition);
}
protected abstract void UpdateValues(DualColour colours);
