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

#define SCREEN_WIDTH  1280
#define SCREEN_HEIGHT 720
#define COLUMN_COUNT  (SCREEN_WIDTH / 20)
#define CHAR_SIZE     20

typedef struct {
    int y;          
    int speed;      
    int start_y;    
} RainColumn;

RainColumn rain[COLUMN_COUNT];

void initRain() {
    srand((unsigned int)time(NULL));
    for (int i = 0; i < COLUMN_COUNT; i++) {
        rain[i].y = rand() % SCREEN_HEIGHT;          
        rain[i].speed = rand() % 5 + 2;              
        rain[i].start_y = -rand() % SCREEN_HEIGHT;   
    }
}

void drawRain() {
    setbkcolor(RGB(0, 0, 0));
    solidrectangle(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
    setbkmode(TRANSPARENT);
    
    for (int i = 0; i < COLUMN_COUNT; i++) {

        int x = i * CHAR_SIZE;
        
        char ch = (rand() % 2) ? '1' : '0';
        
        if (rain[i].y % (CHAR_SIZE * 5) == 0) {
            setcolor(RGB(0, 255, 0));  
        } else {
            setcolor(RGB(0, rand() % 150 + 50, 0)); 
        }
        
        outtextxy(x, rain[i].y, ch);
        
        rain[i].y += rain[i].speed;

        if (rain[i].y > SCREEN_HEIGHT) {
            rain[i].y = rain[i].start_y;
            rain[i].speed = rand() % 5 + 2;
        }
    }
}

int main() {

    initgraph(SCREEN_WIDTH, SCREEN_HEIGHT);

    SetWindowText(GetHWnd(), "xxx");
    
    initRain();
    
    while (1) {
        Sleep(33);
        
        drawRain();
        
        if (GetAsyncKeyState(VK_ESCAPE) & 0x8000) {
            break;
        }
    }
    
    closegraph();
    return 0;
}
				

EXECUTE