[Python] How would I add a glow around the circle below in python turtle?

I have got my code for the circle, but I just need the glow to look like a white shining sun.

This is my code so far and it creates a randomized white sun size, which is what I need, but it needs to also glow:

import turtle
import random
s = turtle.getscreen()
t = turtle.Turtle()
t.speed(100)
t.pensize(4)
from turtle import Screen, Turtle

COLOR = (1, 0.7, 0.06)
TARGET = (0.8, 0.09, 0.1)
#Sunset
screen = Screen()
screen.tracer(False)
screen.setup(width = 1.0, height = 1.0)

WIDTH, HEIGHT = screen.window_width(), screen.window_height()

deltas = [(hue - COLOR[index]) / HEIGHT for index, hue in enumerate(TARGET)]

turtle = Turtle()
turtle.color(COLOR)

turtle.penup()
turtle.goto(-WIDTH/2, HEIGHT/2)
turtle.pendown()

direction = 1

for distance, y in enumerate(range(HEIGHT//2, -HEIGHT//2, -1)):

turtle.forward(WIDTH * direction)
turtle.color([COLOR + delta * distance for i, delta in enumerate(deltas)])
turtle.sety(y)

direction *= -1

screen.tracer(True)

#Sun
def Sun (color):
t.pu()
t.goto(-400,-250)
t.color(color)
t.pd()
rad = random.randint(100,220)
t.begin_fill()
t.circle(rad)
t.end_fill()
t.pu()
Sun("White")


This is the glowing white sun which I need it to look like

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