#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<math.h>
int a,b;
void main()
{
   int gd=DETECT,gm,i,j,x;
   double y,y1;
   a=getmaxx()/2;
   b=getmaxy()/2;
   initgraph(&gd,&gm,"c\\tc\\bgi");


   for(i=0;i<500;i++)
   {
     /* circle(50+i-a,50+i+b,20);*/
     y=200*fabs(sin(0.5*i+3.14159)*exp(-0.025*3.14159));
     y1=50*fabs(sin(0.5*i+3.14159)*exp(-0.025*3.14159));
     ellipse(50+i-a,y,0,360,30,10);
     ellipse(70+i-a,y,0,360,3,1);
     if(i%2==0)
       ellipse(60+i-a,y,0,180,6,18);
	  if(i%4==0)
	   ellipse(60+i-a,y,220,330,6,25);




     clearviewport();
   }
getch();
closegraph();
}