#include<conio.h>
#include<graphics.h>
#include<dos.h>
void main()
{
int i, r;
int gd = DETECT, gm;
initgraph(&gd, &gm, "c:\\tc\\bgi");
do
{
i = 600;
for(r=2; r<=200; r = r + 10)
{
circle(300, 200, r);
sound (i);
delay(30);
i = i +100;
}
nosound();
delay(10);
cleardevice();
i = 2600;
for(r=200; r>=2; r=r-10)
{
circle(300, 200, r);
sound(i);
delay(30);
i = i - 100;
}
nosound();
cleardevice();
}while(!kbhit());
getch();
closegraph();
}