import processing.sound.*;

AudioIn input;
Amplitude amp;
int scale;
int threshold = 50;
color c0 = color(random(255),random(255),random(255), random(20,100));

Circle[] myCircles = new Circle[0];

void setup() {
    size(1024, 768);
    background(255);
    input = new AudioIn(this, 0);
    //input.start(); // capture only
    input.play(); // capture and play
    amp = new Amplitude(this);
    amp.input(input);
    noStroke();
    fill(c0);
}      

void draw() {
    background(255);
    scale = int(map(amp.analyze(), 0, 0.2, 0, threshold));
    fill(c0);
    ellipse(width/2, height/2, scale, scale);
    if (scale>threshold)
      addCircle(scale, c0);
    drawCircles();
}

void addCircle(int s, color c) {
  // Create a new instant of circle
  Circle tempCircle = new Circle(s, c);
  // Add the new circle to Circle array
  myCircles = (Circle[])append(myCircles, tempCircle);
  println("Num of circles: "+myCircles.length);
  
  // generate a new color for the next circle
  c0 = color(random(255), random(255), random(255), random(20, 100));
}

void drawCircles() {
  for (int i = 0; i < myCircles.length; i++) {
    myCircles[i].move();
    myCircles[i].display();
  }
}

void keyPressed() {
  println("Clear all");
  myCircles = new Circle[0];
}