happy.c

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>

const char* RESET = "\x1B[0m";
const char *COLORS[] = { "\x1B[31m", "\x1B[32m", "\x1B[33m", "\x1B[34m", "\x1B[35m", "\x1B[36m" };

int main() {
  srand(time(NULL));
  for(;;) {
    int colorIdx = rand() % 6;
    printf("%s:)%s", COLORS[colorIdx],  RESET);
    int spacing = rand() % 10;
    for(int i = 0; i < spacing; i++) {
      printf(" ");
    }
    fflush(stdout);
    usleep(5000);
  }
}

sad.c

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>

const char* RESET = "\x1B[0m";
const char *COLORS[] = { "\x1B[31m", "\x1B[32m", "\x1B[33m", "\x1B[34m", "\x1B[35m", "\x1B[36m" };

int main() {
  srand(time(NULL));
  for(;;) {
    int colorIdx = rand() % 6;
    printf("%s:(%s", COLORS[colorIdx],  RESET);
    int spacing = rand() % 10;
    for(int i = 0; i < spacing; i++) {
      printf(" ");
    }
    fflush(stdout);
    usleep(5000);
  }
}