text: 
  import kivy
   
  
  from kivy.app import App
  from kivy.uix.boxlayout import BoxLayout
  
  class MainWidget(BoxLayout):
      pass
   
  
  class DemoApp(App):
      def build(self):
          return MainWidget()
   
  if __name__ == '__main__':
      DemoApp().run()
  