i have my code and i want to cycle through the following colors blue green orange red yellow. i got blue but i dont know how to the rest
from Tkinter import *
myfont = ("Arial", 1, "bold")
window = Tk()
window.title("grid")
window.geometry("500x420")
frame = Frame(window)
frame.grid()
button0 = Button(frame, font = ("Arial", 14, "bold"),
fg = "blue", bg = "blue", width = 4, height = 2)
button0.grid(row = 1, column = 0, padx = 0, pady = 0 )
window.mainloop()