//Justin




float horizon=600;
float x=0,y=300;

float w=30;
float h=30;
int n=3; //# of pairs


void setup(){
  size(800,800);
}

void draw(){ 
  
  background(0,0,255);
  fill(0,255,0);
  rect(0,horizon,width,height*3/4);
  flock(n,x,y,w,h);
  x+=10;
  
  
  if (x>width+200){
  y=random(100,500);
  x=0;
  
  }
}

void bird(float x, float y, float w, float h){
  // bird
  fill(255,100,210);
  stroke(0);
  triangle( x,y, x-w,y-h/3,x-w,y+h/3);
  x=x+2;
 
  //move bird
  x=x+2;
   
  if (x>width+200){
    y=random(100,500);
    x=0;
    n=  int (random (3,10) );
  }
  
}


void flock(int n, float x,float y, float w, float h){
  
  float xx=x;
  float ww=w;
  float hh=h*1.25;
  
  //Lead Bird
  bird(xx,y,w,h);
  xx=xx - 1.25 *w ;

    //Pairs of Followers 
    
    for (int j=1; j<n; j++){
  
        //next pair
        //draw pair
  
        bird(xx,y-hh,w,h); 
        bird(xx,y+hh,w,h);
 
        xx=xx - 1.5* w;  //places pair behind last
        ww *= 0.9;  //smaller as the get further back
        hh= hh+ h*1.2;
        


}


}
void keyPressed() {
  // keys
  if (key == 'q') exit();
}