from kivy.app import App
from kivy.lang import Builder
from kivy.uix.floatlayout import FloatLayout
Builder.load_string('''
<Flotante>:
    Button:
        font_size: 40
        text: 'Uno'
        size_hint: 0.1, 0.1 
        pos_hint: {"x": 0, 'y':0}
    Button:
        font_size: 40
        text: 'Dos'
        size_hint: 0.2, 0.2 
        pos_hint: {"x": 0.07, 'y':0.07}    
    Button:
        font_size: 40
        text: 'Tres'
        size_hint: 0.3, 0.3 
        pos_hint: {"x": 0.18, 'y':0.18}    
    Button:
        font_size: 40
        text: 'Cuatro'
        size_hint: 0.4, 0.4 
        pos_hint: {"x": 0.4, 'y':0.35}    
    Button:
        font_size: 40
        text: 'Cinco'
        size_hint: 0.5, 0.5 
        pos_hint: {"x": 0.6, 'y':0.6}    
''')
class Flotante(FloatLayout):
    pass

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

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