Rect = {
  x = 0,
  y = 0,
  width = 10,
  height = 20,
  area = function(Rect) return Rect.width * Rect.height end,
  clone = function()
    o = {};
    o.x = Rect.x;
    o.y = Rect.y;
    o.width = Rect.width;
    o.height = Rect.height;
    o.area = Rect.area;
    return o
  end
}