from kivy.config import Config
Config.set('graphics', 'multisamples', '0')
from kivy.app import App
from kivy.lang import Builder


kv = """
#:import FadeTransition kivy.uix.screenmanager.FadeTransition
#:import Clock kivy.clock.Clock

Screen:

    BoxLayout:
        size_hint_y: None
        orientation: 'horizontal'
        height: 20
        Button:
            text: 'Go back'

        CheckBox:
            size_hint_x: None
            width: 20
            background_checkbox_normal: 'red.png'

"""

sm = Builder.load_string(kv)


class TestApp(App):
    def build(self):
        return sm