#include <stdio.h>
#include <unistd.h>
#include <stdbool.h>

int main()
{
  int i = 1;

  while (true) {
    fprintf(stdout, "some arbitrary output...%d \n",i);
    i+=1;
    if (i%10 == 0)
      fflush(stdout);
    sleep(1);
  }

  return 0;
}