#include < stdio.h > 
#include < conio.h > 
#include < dos.h > 
#include < graphics.h > 
int main(void) {
    struct time t;
    int t0,
    t1;
    int i,
    j;
    int graphdriver = DETECT;
    int graphmode;
    initgraph( & graphdriver, &graphmode, "");
    cleardevice();
    setcolor(WHITE);
    setbkcolor(BLACK);
    setfillstyle(1, RED);
    gettime( & t);
    t0 = t.ti_hund / 10;
    i = 0;
    while (!kbhit() && i < 100) {
        gettime( & t);
        t1 = t.ti_hund / 10;
        if (t1 != t0) {
            fillellipse(200, 200, 100, i);
            t0 = t1;
            i++;
        }
    }
    getch();
    closegraph();
    return 0;
}