from kivy.app import App
from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout
Builder.load_string('''
<caja>:
    orientation: 'vertical'
    padding: 20
    BoxLayout:
        Button:
            text: "Primera Fila, Primera Columna"
            bold: True
        Button:
            text: "Primera Fila, Segunda Columna"
            color: [1, 0, 0, 1]
            bold: True
    BoxLayout:
        Button:
            text: "Segunda Fila, Primera Columna"
            color: [0, 0, 1, 1]
            bold: True
        Button:
            text: "Segunda Fila, Segunda Columna"
            color: [1, 1, 0, 1]
            bold: True
''')
class Caja(BoxLayout):
    pass

class DemoApp(App):
    def build(self):
        return Caja()

if __name__ == '__main__':
    DemoApp().run()
