Code:

from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.boxlayout import BoxLayout
from kivy.clock import Clock
from random import randint
from functools import partial
class ButtonApp(App):
    def build(self):
        main_layout = BoxLayout(orientation="vertical")
        self.number = Label(text="")
        button = Button(
            text="Click",
            size_hint=(0.5, 0.5),
            pos_hint={"center_x": 0.5, "center_y": 0.5},
        )
        button.bind(on_press=self.get_number)
        main_layout.add_widget(button)
        main_layout.add_widget(self.number)
        return main_layout
    def number_random(self, value, key, *largs):
        self.number.text = str(randint(1, 10 ** 10))
    def get_number(self, instance):
        loop = randint(1, 100)
        e = Clock.schedule_interval(partial(self.number_random, "", ""), 0.1)
        Clock.schedule_once(lambda stop: e.cancel(), loop * 0.1)
if __name__ == "__main__":
    app = ButtonApp()
    app.run()

#Mình không biết làm phần đa hệ điều hành kiểu gì :))

#Nhớ install kivy về nhá!