How to write code for fireworks special effects in C language?

Here is a simple example of C language fireworks effect code:

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

void delay(int milliseconds) {
    long pause;
    clock_t now, then;

    pause = milliseconds * (CLOCKS_PER_SEC / 1000);
    now = then = clock();
    while ((now - then) < pause) {
        now = clock();
    }
}

int main() {
    int i, j;

    srand(time(NULL));

    for (i = 0; i < 10; i++) {
        printf("\n");
        for (j = 0; j < 20; j++) {
            if (rand() % 2 == 0) {
                printf("*");
            } else {
                printf(" ");
            }
        }
        delay(500);
    }

    return 0;
}

This code will display a simple fireworks effect on the console. Each loop randomly generates a line of fireworks effect consisting of ‘*’ and spaces, and then delays 500 milliseconds before displaying the next line. You can modify the code according to your own needs to achieve a more complex fireworks effect.