#include <SFML/System.hpp>
#include <iostream>



int main(int argc, char** argv) {
  sf::Clock clock;
  int x = 0;
  bool isUp = true;
  bool isDown= false;
  while(1) {
    if(clock.getElapsedTime() > sf::Time(sf::seconds(0.1))) {

      if (x == 0){
       std::cout << "0" << std::endl;
       bool isUp = true;
       bool isDown= false;
       x++;
      }
      else if (x == 1){
        std::cout << " 0" << std::endl;
        if(isUp){
            x++;
        }
        else if(isDown){
            x--;
        }
      }
      else if (x == 2){
        std::cout << "  0" << std::endl;
        if(isUp){
            x++;
        }
        else if(isDown){
            x--;
        }
      }
      else if (x == 3){
        std::cout << "   0" << std::endl;
        if(isUp){
            x++;
        }
        else if(isDown){
            x--;
        }
      }
      else if (x == 4){
        std::cout << "    0" << std::endl;
        if(isUp){
            x++;
        }
        else if(isDown){
            x--;
        }
      }
      else if (x == 5){
        std::cout << "     0" << std::endl;
        if(isUp){
            x++;
        }
        else if(isDown){
            x--;
        }
      }
      else if (x == 6){
        std::cout << "      0" << std::endl;
        if(isUp){
            x++;
        }
        else if(isDown){
            x--;
        }
      }
      else if (x == 7){
        std::cout << "       0" << std::endl;
        x--;
        bool isUp = false;
        bool isDown= true;
      }

      clock.restart();

    }
  }
}