Botão piscante tkinter - samur2d2/Python GitHub Wiki

import tkinter as tk
import threading
from time import sleep

def cor():
    color = True
    while True:
        if color:
            buttonA.configure(bg="gray")
            color = False
        else:
            buttonA.configure(bg="cyan")
            color = True
        sleep(1)

root = tk.Tk()
root.geometry("250x100")
buttonA = tk.Button(root, text = "Color", bg = "blue", fg = "red")

buttonB = tk.Button(root, text="Click to change color")
buttonA.pack(side=tk.LEFT)
buttonB.pack(side=tk.RIGHT)

threading.Thread(target=cor).start()
root.mainloop()