def drawHUD(self):
        """
        Draw information on population size and current generation
        """
        self.win.move(self.height - 2, self.x_pad)
        self.win.clrtoeol()
        self.win.box()
        self.addstr(2, self.x_pad + 1, "Population: %i" % len(self.grid))
        self.addstr(3, self.x_pad + 1, "Generation: %s" % self.current_gen)
        self.addstr(3, self.x_grid - 21, "s: start    p: pause")
        self.addstr(2, self.x_grid - 21, "r: restart  q: quit")