#include<conio.h>
#include<graphics.h>
int main() {
int gd = DETECT, gm;
initgraph(&gd, &gm, "");
for(int i = 0 ; i < getwindowwidth(); i++) {
putpixel(0 + i, 50, i % 16);
putpixel(0 + i, 50, i % 16);
putpixel(0 + i, 50, i % 16);
putpixel(0 + i, 50, i % 16);
putpixel(0 + i, 50, i % 16);
}
getch();
closegraph();
return0;
}