text: from tkinter import *
  
  window = Tk() # instantiate an instance of a window
  window.geometry("420x420")
  window.title("TreviIt first GUI program")
  
  icon = PhotoImage(file=logo.png)
  window.iconphoto(True, icon)
  window.config(background="black")
  
  window.mainloop() # place window on computer screen, listen for events
  