import kivy
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.gridlayout import GridLayout
from kivy.uix.textinput import TextInput
from kivy.uix.button import Button
from kivy.uix.widget import Widget

class MyGrid(GridLayout):
    def __init__(self,**kwargs):
        super(MyGrid,self).__init__(**kwargs)
        self.cols=4

        self.add_widget(Label(text="the text to encrypt"))

        self.encrypted_txt = TextInput()
        self.add_widget(self.encrypted_txt)

        self.decrypted_txt = TextInput()
        self.add_widget(self.decrypted_txt)

        self.add_widget(Label(text="the decrypted text"))

class Myapp(App):
    def build(self):
        return MyGrid

if __name__ == "__main__":
    Myapp().run()