function Screen(modules) {
  var current = document.querySelector("body > div.on");

  return {
    dialog: dialog,
    select: select
  };

  function select(name) {
    current.className = "";
    current = document.getElementById(name);
    current.className = "on";
  }

  function closeAndRun(dialog, action) {
    return function() {
      dialog.className = '';
      action();
    };
  }

  function dialog(config) {
    var layer = document.getElementById('dialog');
    var dialog = modules.dom.make('div', {});
    dialog.appendChild(modules.dom.make('p', {textContent: config.text}));
    var answers = modules.dom.make('p', {class: 'answers'});
    for(var key in config.answers) {
      answers.appendChild(modules.dom.make('button', {
        textContent: key,
        onClick: closeAndRun(layer, config.answers[key])
      }));
    }
    dialog.appendChild(answers);
    layer.appendChild(dialog);
    layer.className = "on";
  }
}