blink.py

from kivy.app import App
from kivy.lang import Builder
from kivy.factory import Factory


KV = '''
#:import A kivy.animation.Animation

<BlinkyButton@Button>:
    on_press:
        a = A()
        for i in range(10): a += A(background_color=(0, 0, 0, 1), t='in_out_quad') + A(background_color=(1, 1, 1, 1), t='in_out_quad')
        a.start(self)


GridLayout:
    cols: 4
    BlinkyButton:
    BlinkyButton:
    BlinkyButton:
    BlinkyButton:
    BlinkyButton:
    BlinkyButton:
    BlinkyButton:
    BlinkyButton:
    BlinkyButton:
'''

class Application(App):
    def build(self):
        return Builder.load_string(KV)


if __name__ == "__main__":
    Application().run()