gistfile1.rb

class AppDelegate
  def application(application, didFinishLaunchingWithOptions:launchOptions)
    PXEngine.licenseKey('YOUR SERIAL', forUser:'YOUR USER')
    
    @button = UIButton.buttonWithType(UIButtonTypeRoundedRect)
    @button.styleId = "myButton"
    @button.frame = [[100, 100], [80, 40]]
    
    @window = UIWindow.alloc.initWithFrame(UIScreen.mainScreen.bounds)
    @window.addSubview(@button)
    
    PXStylesheet.styleSheetFromFilePath('/Users/pcolton/Desktop/sample.css', withOrigin:0)
    PXStylesheet.currentApplicationStylesheet.monitorChanges = true
    
    @window.makeKeyAndVisible
    true
  end
end