from kivy.uix.button import Button
from kivy.clock import Clock

import time

class ClockButton(Button):
    """Clock on First Screen"""
    def __init__(self, **kwargs):
        super(ClockButton, self).__init__(**kwargs)
        Clock.schedule_interval(self.update, 1)

    def update(self, *args):
        self.text = time.strftime('%I:%M:%S %p')