如何连续改变颜色和文字？(GUI、Python)

import tkinter as tk

def change_color_text():
    if label.cget("text") == "Hello":
        label.config(text="World", fg="blue")
    else:
        label.config(text="Hello", fg="red")
    
    label.after(1000, change_color_text)  # 每隔1秒调用一次change_color_text函数

root = tk.Tk()
root.title("Color and Text Change")

label = tk.Label(root, text="Hello", fg="red", font=("Arial", 24))
label.pack(padx=50, pady=50)

change_color_text()  # 调用函数开始连续改变颜色和文字

root.mainloop()