How do I make btn01 or btn go to a random spot every 4 milliseconds and when you click on it it will stop and do something else?

I want to make any btn go to a random spot every 3 milisecounds, and when you click the random button it will do something else like print Hi and stop the button from moving. Here is the code:

I tried while a == True: but it keeps frezzing when i press the "To make a video" button and just frezzes for a while

import time
import os
import tkinter as tk
import random
from tkinter import *
from tkinter import messagebox
from tkinter import Button
import math
from tkinter import Text
from tkinter import Grid
from tkinter import Place
#from tkinter import place
window = tk.Tk()
window.title("There is no game")
window.geometry("494x300")
numberx = random.randint(1,200)
numbery = random.randint(1,200)
##def clickedrandom():
##  a = False
def toplayagame():
  print("Hi")
a = True
def tomakeavideo():
  T.delete('1.0', END)
  T.insert(tk.END, "People who are watching go hit that subscribe button and hit that like button also hit that little bell to turn on notifcations")
  T.configure(width = 25, height=6)
  while a == True:
    numberx = random.randint(1,200)
    numbery = random.randint(1,200)
    int(numberx)
    int(numbery)
    time.sleep(0.3)
    btn.place(x = numberx, y = numbery)

def pressed():
  T.delete('1.0', END)
  T.insert(tk.END, "Why are you here?")
  btn.place(x=190, y=200)
  T.configure(width = 17, height=1)
  btn.configure(text = "To play a game", width=12,command=toplayagame)
  btn1= Button(window, bd=10,text="To make a video",activebackground='White',activeforeground='Black',bg='Grey',fg='White',height=1,width=15,state=ACTIVE,command=tomakeavideo)
  btn1.pack()
  btn1.place(x=1,y=200)

T = tk.Text(window, height=1, width=10)
T.pack()
T.insert(tk.END, "Hello user")

btn = Button(window, bd=10,text="Hello",activebackground='Black',activeforeground='White',bg='Grey',fg='White',height=1,width=4,state=ACTIVE,command=pressed)
btn.pack()

btn.place(x=215, y=200)


window.mainloop()