def start(self):
        for i in range(0, len(self.text), 1):
            if self.text[i] != " ":
                self.word += self.text[i]
            else:
                self.read_text.delete(0.0, END)
                self.read_text.insert(0.0, self.word)
                self.word = ""
                time.sleep(1)
        self.read_text.delete(0.0, END)
        self.read_text.insert(0.0, self.word)
        self.word = ""

 text_widget.update()