from tkinter import *
import random

def alternar_cor_aleatoria():
    nova_cor = random.choice(['red', 'green', 'blue', 'yellow', 'orange'])
    botao.config(bg=nova_cor)
    root.after(2000, alternar_cor_aleatoria)

root = Tk()
root.geometry('300x100')
root.title("Alternar cor Aleatória")

botao = Button(root, text="Clique para alternar", bg='blue', fg='white')
botao.pack(pady=20)

alternar_cor_aleatoria()
root.mainloop()