var button = require('@amperka/button') 
  .connect(P2);
  
var buzzer = require('@amperka/buzzer') 
  .connect(P5);
  
var light = require('@amperka/led') 
  .connect(P1);
  
var animation = require('@amperka/animation') 
  .create({
    from: 0,
    to: 1,
    loop: true, 
    updateInterval: 0.01
});

var armed = false;

animation.on('update', function(val) { 
  light.brightness(val); 
  buzzer.frequency(1000 + 4000 * val);
});

button.on('press', function() { 
  armed = !armed; 
  buzzer.toggle(armed); 
  light.toggle(armed);
  if (armed) { 
    animation.play();
  } else {
    animation.stop(); 
  }
});