def display_main_menu(self, *args):
self.clear_level()
layout_width = self.width * .2
layout_x = self.width * .4
layout_y = self.height * .1
self.menu = MainMenu(self,
x=layout_x,
y=layout_y,
width=layout_width,
current_level=self.current_level)
self.add_widget(self.menu)
