#include<conio.h>
#include<graphics.h>
#include<dos.h>
void main()
{
int i, x, y, r;
int gd = DETECT, gm;
initgraph(&gd, &gm,"c:\\tc\\bgi");
for(x=100; x<=500; x=x+10)
circle(x, 100, 20);
delay(20);
for(y=100; y<=400; y=y+10)
{
circle(500, y, 20);
delay(20);
}
for(x=500; x>=100; x=x-10)
{
circle(x, 400, 20);
delay(20);
}
for(y=400; y>=100; y=y-10)
{
circle(100, y, 20);
delay(20);
}
getch();
closegraph();
}