How to make animated typing text label in Python Tkinter?

 

from tkinter import *

root=Tk()
root.title("Hancie e-Learning Studio")
root.geometry("500x300")


#### animation section
index = 0
txt = [' ','|',' ','|',' ','|','W|','WE|','WEL|','WELC|','WELCO|','WELCOM|','WELCOME|','WELCOME |','WELCOME U|','WELCOME US|'
       ,'WELCOME USE|','WELCOME USER|']

def start_animation():
    global index

    if not index+1 > len(txt):
        text_animation_lbl.config(text=txt[index])
        index += 1
        root.after(250, start_animation)

    else:
        index = 0
        text_animation_lbl.config(text='|')
        root.after(250,start_animation)




text_animation_lbl = Label(root,text="|",font= ("verdana",24,"bold"))
text_animation_lbl.grid(row=0,column=0)

root.after(250,start_animation)



root.mainloop()