// Fireflies
// A simple firefly simulation
// Press and hold a key to shed some light on the process
// MARK ROLAND <markrolanddesign.com>
// Oct 18, 2005

firefly[] fly;
int num_flies;
int release;

void setup(){
  size(420,260);
  background(64);
  smooth();
  framerate(20);

  num_flies = 12;
  fly = new firefly[num_flies];

  for(int i=0; i<num_flies; i++){
    fly[i] = new firefly(random(width), random(height));
  }

}

void draw(){
  if(!keyPressed && release <= 0){
    background(0);
  }
  else{
    fill(128, 10);
    rect(0,0,width, height);
  }
  if(release > 0){
    fill(release);
    rect(0,0,width, height);
    release -= 10;  
  }

  for(int j=0; j<num_flies; j++){
    fly[j].go();
  }  
}

void keyReleased(){
  release = 96;
}