from tkinter import *
from tkinter.ttk import *
import time
from ctypes import windll

windll.shcore.SetProcessDpiAwareness(1)

GB = 10
download = 0
speed = 1

def start():
    global download
    if download < GB:
        print(download)
        bar['value'] = download / GB * 100
        percent.set(f"{int((download / GB) * 100)}%")
        text.set(f"{download}/{GB} GB downloaded")
        download += 1
        window.after(200, start)
    else:
        percent.set(f"100%")
        text.set(f"All downloaded")
        download = 0



window = Tk()

percent = StringVar()

percentLabel = Label(textvariable=percent)
percentLabel.pack()

text = StringVar()

taskLabel = Label(textvariable=text)
taskLabel.pack()

bar = Progressbar(window, orient=HORIZONTAL, length=300)
bar.pack(pady=10)

button = Button(window, text="download", command=lambda:window.after(0, start)).pack()

window.mainloop()