#include <iostream>
#include <string>

using namespace std;

const char ESC = (char)27;

void cursor_goto(int x, int y)
{ cout << ESC << "[" << y << ";" << x << "f"; }

void clear_screen()
{ cout << ESC << "[2J"; }

void press_enter_to_continue()
{ string s;
  getline(cin, s); }

// see https://espterm.github.io/docs/VT100%20escape%20codes.html for more codes

int main()
{ clear_screen();
  for (int i = 1; i <= 24; i += 1)
  { cursor_goto(i*2-1, 25-i);
    cout << "##"; }
  press_enter_to_continue();
  for (int i = 1; i <= 24; i += 1)
  { cursor_goto(i*2-1, 25-i);
    cout << "@"; } }