01.open_window.py

import pygame                       #first import pygame module
pygame.display.set_mode((400,400))  # set up the display size width and height
                                    #now run the program and read the next line after running the program













                                    #close the program by colsing the terminal
                                    #you notiched a problem on quiting the pygame window.
                                    #we have to add an if statement so that we can close the game by clicking on the close button.