text: from kivy.app import App
  from kivy.uix.button import Button
  from kivy.uix.codeinput import CodeInput
  from pygments.lexers import HtmlLexer
  from kivy.config import Config
  Config.set('graphics','resizable','0');
  
  
  
  class Myapp(App):
          def build(self):
                  return CodeInput(lexer=HtmlLexer())
                  return Button(text="Hello!",
                                font_size=34,
                                on_press=self.btn_press,
                                background_color=[1,0,0,1])
          def btn_press(self,instance):
                  print ("World!")
                  instance.text="You are clicked me!"
                  instance.background_color=[2.3,4,2,5]
                  
          pass
  if __name__=="__main__":
          Myapp().run()
  