How to keep the last selection of a Tkinter radio button selected?

Question

Good night! Is there any way to keep the last option clicked on radiobuttion buttons in python Tkinter lib selected? I would like, even when closing the program, when I opened it again, the option was selected. Thank you

import tkinter as tk
import serial
import time

ser = serial.Serial('COM4',9600, timeout=1)
time.sleep(2)

root = tk.Tk()
root.title("LED RGB CONTROL - RAMON BASILIO PROJECT")
root.geometry("600x120")
root.configure(background="#12AEFF")

v = tk.IntVar()
v.set(0)  # initializing the choice, i.e. Python

colors = [
    "LED_1",
    "LED_2",
    "LED 1/LED 2",
    "NONE"
]

def ShowChoice():
    print(v.get())
    if v.get() == 0:
        ser.write(b'0')

    if v.get() == 1:
        ser.write(b'1')

    if v.get() == 2:
        ser.write(b'2')

    if v.get() == 3:
        ser.write(b'3')    

tk.Label(root, 
         text="Choose what Led will turn on",
         background = "#12AEFF",
         padx = 20).pack(anchor=tk.W)

for val, color in enumerate(colors):
    tk.Radiobutton(root, 
                  text=color,
                  indicatoron = 0,
                  width = 20,
                  padx = 20, 
                  variable=v, 
                  command=ShowChoice,
                  value=val).pack(anchor=tk.W)
root.mainloop()

The basic code is this. My intention is to make a GUI to control an addressable LED tape that I will install on my pc. The LED tape in turn is connected to an Arduin. What I wanted was to keep the last choice fixed even after closing and opening the window.