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// gcc -std=c99 -Wall -Wextra -pedantic -O3 -o cellular cellular.c 

#include <stdio.h>
#include <stdlib.h>

int main(void)
{
  unsigned char table[8] = { 0, 1, 1, 1, 0, 1, 1, 0 };
  int length = 8000 * 30;
  int delay = 200;
  unsigned char *buffer = malloc(length);
  for (int i = 0; i <= delay; ++i)
  {
    buffer[i] = -(rand() / (double) RAND_MAX > 0.5);
  }
  for (int i = delay + 1; i < length; ++i)
  {
    int j = i - delay;
    unsigned char s = 0;
    s += (!!buffer[j - 1]) << 2;
    s += (!!buffer[j    ]) << 1;
    s += (!!buffer[j + 1]);
    buffer[i] = -table[s];
  }
  fwrite(buffer, length, 1, stdout);
  free(buffer);
  return 0;
}