/*
Problem Statement: 
Code from Computer Graphics (SPPU - Second Year - Computer Engineering - Content) repository on KSKA Git: https://git.kska.io/sppu-se-comp-codes/CG
*/

// BEGINNING OF CODE
#include <iostream>
#include <cstdlib>
#include <graphics.h>
using namespace std;

int main() {
	int gd = DETECT, gm;
	int i, x, y, flag=0;
	initgraph(&gd, &gm,NULL);
	/* get mid positions in x and y-axis */
	x = getmaxx()/2;
	y = 30;
	while (1) {
		if(y >= getmaxy()-30 || y <= 30) {
			flag = !flag;
		}
		/* draws the gray board */
		setcolor(RED);
		//setfillstyle(SOLID_FILL, RED);
		circle(x, y, 30);
		floodfill(x, y, RED);
		/* delay for 50 milli seconds */
		delay(50);
		/* clears screen */
		cleardevice();
		if(flag) {
			y = y + 5;
		}
		else {
			y = y - 5;
		}
	}
	delay(5000);
	closegraph();
	return 0;
}
// END OF CODE