program-
from tkinter import *
#create a window screen
win=Tk()
def change():
l.config(text='Text has been changed')
l.config(fg='White')
l.config(bg='Green')
#create a label
l=Label(win,text="This is First text on the screen")
l.place(x=100,y=100)
#create a button
b=Button(win,text="Change Text and color",command=change)
b.place(x=100,y=150)
#hold the screen
win.mainloop()