如何同时但异步地移动两个tkinter小部件？

import tkinter as tk

def move_widget1():
    x1, y1 = canvas.coords(widget1)
    canvas.coords(widget1, x1 + 5, y1 + 5)  # 移动widget1的坐标
    root.after(100, move_widget1)  # 100毫秒后再次调用move_widget1函数

def move_widget2():
    x2, y2 = canvas.coords(widget2)
    canvas.coords(widget2, x2 - 5, y2 - 5)  # 移动widget2的坐标
    root.after(100, move_widget2)  # 100毫秒后再次调用move_widget2函数

root = tk.Tk()

canvas = tk.Canvas(root, width=400, height=400)
canvas.pack()

widget1 = canvas.create_oval(50, 50, 100, 100, fill="red")
widget2 = canvas.create_oval(150, 150, 200, 200, fill="blue")

move_widget1()  # 启动移动widget1的函数
move_widget2()  # 启动移动widget2的函数

root.mainloop()