I cannot seem to get my tkinter program to work properly. I have tried many different solutions, but still cannot get it to work.

Here’s my code:

root = Tk()
root.title('GUI')

text = r"""
 _____ _       _     _
|  ___(_)_ __ (_)___| |__   ___ _ __
| |_  | | '_ | / __| '_  / _  '__|
|  _| | | | | | __  | | |  __/ |
|_|   |_|_| |_|_|___/_| |_|___|_|
=====================================
Press 'Y' to start!
Remember to press it at the start of the sum!
You will need to do the first question before starting it
(Start the bot on the second question)
  """

header=Label(root,text=text, font=("TkFixedFont"),justify='left')
header.grid(column=0,row=0)

scrollbar = Scrollbar(root)
scrollbar.grid(column=5,row=0,sticky='ns')
mylist = Listbox(root, yscrollcommand=scrollbar.set)

l1 = Label(root, text='Delay: ')
l1.grid(column=0,row=3,sticky='w')

delayEntry = Entry(root,width=4)
delayEntry.grid(column=1,row=3,sticky='w')

b1 = Button(root, text='Set', command=mainthread.setDelay)
b1.grid(column=2,row=3,sticky='w')
    
mylist.grid(column=3,row=0,sticky='nsew')
scrollbar.config(command=mylist.yview)

root.rowconfigure(1, weight=1)
root.columnconfigure(1, weight=1)

mainloop()

What it gave me:

A rubbish looking gui with incorrectly sizing and expanding widgets

bad

What i want:

A good looking gui with correct sizing and expansion of widgets.

good