def instart(self, *args): anim = Animation(opacity=1, duration=1) anim += Animation(opacity=1, duration=3) anim += Animation(opacity=0, duration=1) anim.bind(on_complete=self.instart) anim.instart(self.root.ids[f"text{self.id}"]) if self.id < 4: self.id += 1 else: self.id -= 3