#include<graphics.h>
#include<conio.h>
#include<dos.h>
#include<math.h>
#include<stdlib.h>
int gm, gd=DETECT; // Detects Graphics Driver
int i, px[20], py[20], pl[20], p[20], pc[20][80];
double j;
void main()
{

	initgraph(&gd,&gm,"c:/tc/bgi");
	settextstyle(0,0,8);
	setcolor(4);
	outtextxy(100,200,"GOOD");
	setcolor(4);
	outtextxy(375,200,"DAY");

	while(!kbhit())
	{
	 delay(5); // change this for your system's clock speed
	 for(i=0;i<20;i++)
	    for(j=1;j<315;j+=4)
		  putpixel(px[i]+p[i]*cos(j/22*7),
				 py[i]+p[i]*sin(j/22*7),pc[i][j/4+1]);
	 for(i=0;i<20;i++){ // i=20
	    p[i]++;
	    if(p[i]>pl[i]){
		  px[i]=random(640);
		  // if no < 640 then fade from left to right
		  py[i]=random(480);
		  // if no < 480 then fade from top to bottom
		  p[i]=1;
		  pl[i]=px[i]>320?px[i]:640-px[i];
	    }
	 }
	}
	cleardevice();
	closegraph();
}
/*
------------
d=0.97*d*(1.0+0.04*sin(r*1)); r=r+0.1*pow(1.0-d,3.0);

-----------
n=w/3
x=(i-0.5)*2 - cos(i*3.14159)*0.3*v; y=v*0.7+0.3-sin(i*3.14159)*0.3;
d=0.98*d - pow(sin(r+3.14159/2),1)*0.03 - y * 0.1;
*/