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var Engine = require('famous/core/Engine');
var Surface = require('famous/core/Surface');

var mainContext = Engine.createContext();
var surface = new Surface({
  size: [undefined, 100],
  content: 'press a key in the preview window',
  properties: {
    color: 'white',
    textAlign: 'center',
    backgroundColor: '#FA5C4F'
  }
});

mainContext.add(surface);

Engine.on('keydown', function(){
  surface.setContent(e.which);
});