Line head;
Line body;

void setup(){
  size(650,750);
  background(255);
  frameRate(20);
  head = new Line (0, 0);
  body = new Line (10, 10);
}
void draw(){
   head.drawing();
   body.drawing();
  
}
void mousePressed(){  
   noLoop();
 }   
void keyPressed(){
   background(255); 
   loop();
 } 

class Line{
  float x, y;
  float a, b;
  float xx, yy;
  float ranx;
  float rany;
  int life;
  
  Line (float posx, float posy){
    a = width/2;
    b = height/2.3;
    x = posx;
    y = posy;
    ranx = 1;
    rany = 1;
  }    
    void drawing(){
         xx = x;
         yy = y;   
          x+= ranx;
          y+= rany;
      ranx += random(-10,10)*0.08;
      rany += random(-10,11)*0.08;
      
      stroke(0,50);
      strokeWeight(random(0,2));
      line(a+xx,b+yy,a+x,b+y);
      line(a-xx,b+yy,a-x,b+y);
      life++;
      if (life>65){
      float t = random(100);
            x = 25*sin(t);
            y = 60*cos(t+10);
           xx = 0;
           yy = 0;
         ranx = 0;
         rany = 0;
         life = 0;
      }
    }
  }