How to use the ursina.sequence.Func function in ursina

def destroy(entity, delay=0):
    if delay == 0:
        _destroy(entity)
        return

    s = Sequence(
        Wait(delay),
        Func(_destroy, entity)
    )
    s.start()

def invoke(function, *args, **kwargs):
    delay = 0
    if 'delay' in kwargs:
        delay = kwargs['delay']
        del kwargs['delay']

    if not delay:
        function(*args, **kwargs)
        return function

    s = Sequence(
        Wait(delay),
        Func(function, *args, **kwargs)
    )
    s.start()
    return s

def shake(self, duration=.2, magnitude=1, speed=.05, direction=(1,1)):
        import random
        s = Sequence()
        original_position = self.position
        for i in range(int(duration / speed)):
            s.append(Func(self.set_position,
                Vec3(
                    original_position[0] + (random.uniform(-.1, .1) * magnitude * direction[0]),
                    original_position[1] + (random.uniform(-.1, .1) * magnitude * direction[1]),
                    original_position[2],
                )))
            s.append(Wait(speed))
            s.append(Func(self.set_position, original_position))

        s.start()
        return s

setattr(self, animator_name, Sequence(time_step=time_step))
        sequence = getattr(self, animator_name)
        self.animations.append(sequence)
        # sequence.append(Wait(delay))
        if not resolution:
            resolution = max(int(duration * 60), 1)

        for i in range(resolution+1):
            t = i / resolution
            # if isinstance(curve, CubicBezier):
            #     t = curve.calculate(t)
            # else:
            t = curve(t)

            sequence.append(Wait(duration / resolution))
            sequence.append(Func(setattr, self, name, lerp(getattr(self, name), value, t)))

        sequence.start()
        return sequence

if __name__ == '__main__':

    app = Ursina()
    e = Entity(model='quad')
    s = Sequence(
        1,
        Func(print, 'one'),
        Func(e.fade_out, duration=1),
        1,
        Func(print, 'two'),
        Func(e.fade_in, duration=1),
        loop=True
        )

    s.append(
        Func(print, 'appended to sequence')
        )

    def input(key):
        actions = {'s' : s.start, 'f' : s.finish, 'p' : s.pause, 'r' : s.resume}
        if key in actions:
            actions[key]()

    app.run()

def blink(self, value=color.clear, duration=.1, delay=0, curve=curve.in_expo, resolution=None, interrupt=False, time_step=None):
        _original_color = self.color
        if hasattr(self, 'blink_animator'):
            self.blink_animator.finish()
            self.blink_animator.kill()
            # print('finish blink_animator')
        self.blink_animator = Sequence(
            Func(self.animate_color, value, duration*.4, 0, curve, resolution, interrupt),
            Func(self.animate_color, _original_color, duration*.4, duration*.5, curve, resolution, interrupt, time_step)
        )
        self.blink_animator.start()
        return self.blink_animator

application.sequences.remove(self)
                del self



if __name__ == '__main__':

    app = Ursina()
    e = Entity(model='quad')
    s = Sequence(
        1,
        Func(print, 'one'),
        Func(e.fade_out, duration=1),
        1,
        Func(print, 'two'),
        Func(e.fade_in, duration=1),
        loop=True
        )

    s.append(
        Func(print, 'appended to sequence')
        )

    def input(key):
        actions = {'s' : s.start, 'f' : s.finish, 'p' : s.pause, 'r' : s.resume}
        if key in actions:
            actions[key]()

    app.run()

def append(self, arg):
        self.args.append(arg)

        if isinstance(arg, Wait):
            self.duration += arg.duration
        elif isinstance(arg, (int, float)):
            self.duration += arg

        elif isinstance(arg, Func):
            arg.delay = self.duration
            self.funcs.append(arg)

return

            if self.auto_destroy and self in application.sequences:
                application.sequences.remove(self)
                del self



if __name__ == '__main__':

    app = Ursina()
    e = Entity(model='quad')
    s = Sequence(
        1,
        Func(print, 'one'),
        Func(e.fade_out, duration=1),
        1,
        Func(print, 'two'),
        Func(e.fade_in, duration=1),
        loop=True
        )

    s.append(
        Func(print, 'appended to sequence')
        )

    def input(key):
        actions = {'s' : s.start, 'f' : s.finish, 'p' : s.pause, 'r' : s.resume}
        if key in actions:
            actions[key]()

    app.run()