/**sqtrip.java by gregvan now resizeable!
 * RECOMMENDED SIZE: height 400, width 600
*or larger/smaller as you wish 
 **/

import java.applet.*;
import java.awt.*;

public class asqtrip4 extends Applet implements Runnable
{
int pd;//repeat lines
int cx,cy; //center of screen x and y
int bw;//black and white variable
int bwq=1;//b&w initial counter value    
int rr,gg,bb;//color variables       
int rq=1; // color up-down counters
int gq=1;
int bq=1;

int x, y; //endpoint locations
int z;
int a;
int zz=1; //endpoint up-down counters
int xx=2;
int yy=3;
int aa=4;

//new
int joe,sue,suewow;
int fred=1;      
        Thread    myRunner;

        Image     buffer;         
        Dimension appletSize;     
        Graphics  bufferGraphics; 

        public void init()
        {    
        setBackground(Color.black);
        appletSize = this.getSize();     
        buffer = this.createImage(appletSize.width, appletSize.height);
        bufferGraphics = buffer.getGraphics();
	cx=appletSize.width/2;
	cy=appletSize.height/2;
        }

        public void start()
        {
             if (myRunner == null)
             {
                 myRunner = new Thread(this);
                 myRunner.start();
             }
        }

        public void run()
        {
            Thread  executingThread;                   
            executingThread = Thread.currentThread();

            while (myRunner == executingThread)
            {
               //new random numbers to start animation
	       x=(int)(Math.random() *400);
		x=x-200;
               y=(int)(Math.random() *300);
		y=y-150;
               z=(int)(Math.random() *500);
		z=z-250;
               repaint();
               try
               {Thread.sleep(1000);}
               catch(InterruptedException e) {} 

               while (myRunner != null)
               {
                  repaint(); 
                  try
                  {Thread.sleep(100); }
                  catch (InterruptedException e) {}
               }  
           } 
        }

       // make sure the animation really stops when exiting webpage
        public void stop()
        { 
          if (myRunner != null)
             { myRunner = null; }
        }

        //used to prevent blinking graphics....
        public void update(Graphics g)
        {paint(g);}

        public void paint(Graphics g)
        {

  gg=gg+gq;
           if(gg>252){gq=-2;}
           if(gg<3){gq=2;}
             //for loop to paint 5 images before sleeping .1 second 
    
suewow=suewow+1;
if (suewow>65){suewow=-9;} 
       
pd=pd+1;
if(pd>5){pd=1;}
for (int i=0;i<5;i++)
          {

             //color changer up-down counters
           rr=rr+rq;
           if(rr>253){rq=-1;}
           if(rr<2){rq=1;}

           bb=bb+bq;
           if(bb>250){bq=-3;}
           if(bb<5){bq=3;}
	
//black and white changer
	  bw=bw+bwq;
	if(bw>245){bwq=-1;}
	if(bw<10){bwq=2;}
	
           //move the endpoints of the lines
           




//new
joe=joe+fred;
if (joe>10){fred=-1;}
if(joe<-10){fred=1;}



//up-down counters     

           z=z+zz;
           if(z>400){zz=-1;}
           if(z<-400){zz=pd;}

           a=a+aa;
           if(a>325){aa=-1;}
           if(a<-325){aa=pd;}

           x=x+xx;
           if(x>350){xx=-pd;}
           if(x<-350){xx=1;}

           y=y+yy;
           if(y>375){yy=-pd;}   
           if(y<-375){yy=1;} 


           //apply the new numbers for color
        Color cNew = new Color(rr, gg, bb);
        bufferGraphics.setColor(cNew);  
          //draw the lines set 1
        bufferGraphics.drawLine(cx+ x-joe,cy+ y,cx+ z+joe,cy+y);
      bufferGraphics.drawLine(cx- x+joe,cy+ y,cx- z-joe,cy+y);
  //draw the lines set 1a
        bufferGraphics.drawLine(cx+ x-joe,cy- y,cx+ z+joe,cy-y);
      bufferGraphics.drawLine(cx- x+joe,cy- y,cx- z-joe,cy-y);
     //apply the new numbers for color
        Color tNew = new Color(gg, bb, rr);
        bufferGraphics.setColor(tNew);  
   //draw the lines set 2
        bufferGraphics.drawLine(cx+ z,cy+ x+joe,cx+ z,cy+a+joe);
      bufferGraphics.drawLine(cx- z,cy+ x+joe,cx- z,cy+a+joe);
//draw the lines set 2a
        bufferGraphics.drawLine(cx+ z,cy- x-joe,cx+ z,cy-a-joe);
      bufferGraphics.drawLine(cx- z,cy- x-joe,cx- z,cy-a-joe);




     //black and white lines     
     Color dNew = new Color(bw,bw,bw);
     bufferGraphics.setColor(dNew);    

  //draw the lines set 1
        bufferGraphics.drawLine(cx+ x-joe,cy+ y+pd,cx+ z+joe,cy+y-pd);
      bufferGraphics.drawLine(cx- x+joe,cy+ y+pd,cx- z-joe,cy+y-pd);
 //draw the lines set 1a
        bufferGraphics.drawLine(cx+ x-joe,cy- y-pd,cx+ z+joe,cy-y+pd);
      bufferGraphics.drawLine(cx- x+joe,cy- y-pd,cx- z-joe,cy-y+pd);

  //black and white lines     
     Color vNew = new Color(256-bw,256-bw,256-bw);
     bufferGraphics.setColor(vNew);    
//draw the lines set 2
        bufferGraphics.drawLine(cx+ z+pd,cy+ x+joe,cx+ z-pd,cy+a+joe);
      bufferGraphics.drawLine(cx- z-pd,cy+ x+joe,cx- z+pd,cy+a+joe);
//draw the lines set 2a
        bufferGraphics.drawLine(cx+ z+pd,cy- x-joe,cx+ z-pd,cy-a-joe);
      bufferGraphics.drawLine(cx- z-pd,cy- x-joe,cx- z+pd,cy-a-joe);





 
      
   


       
    }//end of for loop i
     // move the entire buffer onto the display screen and change
     // pixels that are a different color...
      g.drawImage(buffer, 0, 0, this);
    }
} // end of the program...