GAS-MadLibs.gs

function doGet() {
  var app = UiApp.createApplication();
  var formPanel = app.createFormPanel();
  var verticalPanel = app.createVerticalPanel();
  var label1 = app.createLabel("Enter a thing here: ");
  var textBox1 = app.createTextBox().setName('textBoxResult1');
  var label2 = app.createLabel("Enter a feeling here: ");
  var textBox2 = app.createTextBox().setName('textBoxResult2');
  var submitButton = app.createSubmitButton("Click to submit");

  verticalPanel.add(label1).add(textBox1).add(label2).add(textBox2).add(submitButton);
  formPanel.add(verticalPanel);
  app.add(formPanel);
  return app;
}

function doPost(e) {
  var app = UiApp.getActiveApplication();
  var label1 = app.createLabel("I love to eat " + e.parameter.textBoxResult1 + " on tuesdays.");
  var label2 = app.createLabel("It makes me feel " + e.parameter.textBoxResult2 + ".");
  app.add(label1).add(label2);
  return app;
}