C++ does help with boredom - A simple do-nothing program

I got bored earlier today and decided to make a simple program that displays 1 - 10 and then starts repeating the alphabet over and over again until you quit it:

#include <iostream>
#include <unistd.h>
#include <cstdlib>

using namespace std;

int main() {
    sleep(1);
    cout << "1\n";
    
    sleep(1);
    cout << "2\n";
    
    sleep(1);
    cout << "3\n";
    
    sleep(1);
    cout << "4\n";
    
    sleep(1);
    cout << "5\n";
    
    sleep(1);
    cout << "6\n";
    
    sleep(1);
    cout << "7\n";
    
    sleep(1);
    cout << "8\n";
    
    sleep(1);
    cout << "9\n";
    
    sleep(1);
    cout << "10\n";
    
a:
    cout << "A B C D E F G H I J K L M N O P Q R S T U V W X Y Z\n";
    goto a;
}