import tkinter as tk
import threading

def Destroy():
    root.destroy()

def TextOnWindow():
    global root
    root = tk.Tk()
    label = tk.Label(root, text='Text on the screen',
                     font=('Times New Roman','80'), fg='black', bg='white')
    label.pack()
    root.overrideredirect(True)
    root.geometry("+250+250")
    root.wm_attributes("-topmost", True)
    root.wm_attributes("-disabled", True)
    root.wm_attributes("-transparentcolor", "white")
    root.mainloop()

while True:
    i = input('Test ')
    if i == '1':
        x = threading.Thread(target=TextOnWindow)
        x.start()
    if i == '0':
        des = threading.Thread(target=Destroy)
        des.start()