import tkinter as tk, time



root = tk.Tk()
Frame_Width = 800
Frame_Height = 300
root.geometry(f'{Frame_Width}x{Frame_Height}')
canvas = tk.Canvas(root)
canvas.pack()
canvas.config(width = Frame_Width, height = Frame_Height)
root.title("Checkerboard")


SIZE = 20
color = "black"
move = 0

while True:
	canvas.delete("all")
	move += 60

	for y in range(8):
		if (y%2 == 0):
			color = "black"
		else:
			color = "white"
		
		for x in range(8):

			x1 = x*SIZE + move
			y1 = y*SIZE + 50

			x2 = x1 + SIZE
			y2 = y1 + SIZE

			canvas.create_rectangle([x1,y1,x2,y2], fill = color)
			if(color == "black"):
				color = "white"
			else:
				color = "black"
			time.sleep(0.01)
			canvas.update()
	
	if x2 > Frame_Width:
		move = 0

canvas.update()

time.sleep(20)

root.destroy()