from tkinter import *

from tkinter.ttk import Progressbar

from tkinter import ttk

window = Tk()

window.title("Welcome to LikeGeeks app")

window.geometry('350x200')

style = ttk.Style()

style.theme_use('default')

style.configure("black.Horizontal.TProgressbar", background='blue')

bar = Progressbar(window, length=200, style='black.Horizontal.TProgressbar')

bar['value'] = 90

bar.grid(column=0, row=0)

window.mainloop()