import processing.opengl.*;

p p[];

void setup(){
   size(screen.width,screen.height,OPENGL);
   smooth();

   p=new p[37*100];
   for(int i=0; i<p.length; i++)p[i]=new p(i/5000.0,500,500);
}

void draw(){
   fill(0,30);
   noStroke();
   rect(0,0,width,height);background(0,0,0);

   stroke(255);
   for(int i=0; i<p.length; i++) p[i].update();//render particles
}

class p {
   float id,x,y,xp,yp,s,d;

   public p(float _id,float _x,float _y) {
     id=_id;
     x=xp=_x;
     y=yp=_y;
     s=random(2,10);
   }

   void update(){

     id+=0.01;
     d=(noise(id,x/mouseY,y/mouseY)-0.5)*mouseX;

     x+=cos(radians(d))*s;
     y+=sin(radians(d))*s;

     if(x<-10) x=xp=width+10;//offscreen rewind
     if(x>width+100)x=xp=-10;
     if(y<-10) y=yp=height+10;
     if(y>height+10)y=yp=-10;

     line(xp,yp,x,y);
     xp=x;
     yp=y;
   }
}