from tkinter import *
from tkinter import scrolledtext

window = Tk()

window.title("Welcome to Tkinter!")
window.geometry('400x300+30+200')

txt = scrolledtext.ScrolledText(window,width=40,height=10)
txt.insert(INSERT,'Overwrite this text')
txt.insert(0.0,'---> ')

txt.grid(column=0,row=0)
txt.pack()



window.mainloop()