Bouncing ball

#include 
#include
#include
main()
{
   int gm,x,y,gd=DETECT,i;
   initgraph(&gd,&gm,"z:\\tc\\bgi");// This is to initialise graphics
   x=getmaxx();
   y=getmaxy();
   setcolor(3);

   line(0,470,650,470);


 for(i=0;i<150;i=i+10)// this is the for loop for continuing bouncing of ball
{
 setcolor(5);
 circle(2+i,310+i,20);//for balls size
 delay(300);// by hoe much speed the ball will bounce
 setcolor(0);
 circle(2+i,310+i,20);
}
  for(i=0;i<=150;i=i+10)
{
 setcolor(10);
circle(140+i,450-i,20);
 delay(100);
 setcolor(0);
 circle(140+i,450-i,20);
}

 for(i=0;i<150;i=i+10)
{
 setcolor(10);
 circle(300+i,310+i,20);
 delay(100);
 setcolor(0);
 circle(300+i,310+i,20);
}
 for(i=0;i<=150;i=i+10)
{
 setcolor(10);
circle(450+i,450-i,20);
 delay(100);
 setcolor(0);
 circle(450+i,450-i,20);
}
getch();
closegraph();
}