import ddf.minim.*;

Minim minim = new Minim(this);

AudioSample bounce;

boolean hit = false;

float x = random(80) + 10;

float y = random(80) + 10;

float w = 10;

float xv = 1.1;

float yv = 1.2;

void setup() {

  bounce = minim.loadSample("bounce.wav");

}

void draw() {

  x += xv;

  y += yv;

  if(x<w/2 || x>100-w/2) {

    xv *= -1;

    bounce.trigger();

    hit = true;

  }

  if(y<w/2 || y>100-w/2) {

    yv *= -1;

    if (!hit) bounce.trigger();

  }

  background(255);

  ellipse(x, y, w, w);

  hit = false;

}

void stop()

{

  // always close Minim audio classes when you are done with them

  bounce.close();

  minim.stop();

  super.stop();

}