while self.counter <= self.limit:
            for k in range(self.delta):
                if self.counter in data:
                    self.output.append([self.current_x, self.current_y, self.counter])
                self.counter += 1
                self.next_point()
            if self.side % 2 == 0:
                self.delta += 1
            self.direction = (self.direction + 1) % 4
            self.side += 1