var buzzer = require('@amperka/buzzer') 
  .connect(P5)
  .turnOn();

var sensor = require('@amperka/light-sensor') 
  .connect(A2);

var button = require('@amperka/button') 
  .connect(P3);

button.on('press', function() { 
  buzzer.toggle();
});

setInterval(function() { 
  buzzer.frequency(20 * sensor.read('lx'));
}, 10);