cmatrix

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define WIDTH 250

inline int prob(int n) {
    switch (n) {
    case 2:  return 20;
    case 1:  return 10;
    default: return 20;
    }
}

int main() {
    unsigned char cols[WIDTH];
    int i, j;
    struct timespec t;
    srand(time(NULL));
    t.tv_sec = 0;
    t.tv_nsec = 5e7L;
    fputs("\033[38;5;82m", stdout);
    for (i=0; i<WIDTH; i++)
        cols[i] = rand()%3;
    while (1) {
        for (i=0; i<WIDTH; i++) {
            j = cols[i];
            if (j == 2) fputs("\033[38;5;82m", stdout);
            else if (j) fputs("\033[38;5;28m", stdout);
            else        fputs("\033[30m",      stdout);
            putchar(32+rand()%(126-32));
            if (!(rand()%prob(j))) cols[i] = (j+2)%3;
        }
        fflush(stdout);
        nanosleep(&t, NULL);
        putchar('\n');
    }
    return 0;
}