Circle generator

from random import * #Import every function from random and tkinter.
from tkinter import *

size = 500 #Set the size of the canvas to 500 pixels (px).

window = Tk() #Make a window.

canvas = Canvas(window, width=size, height=size) #Width & height = var size.
canvas.pack() # Add the canvas to the window.

while True: #Forever loop
    col = choice(["pink", "orange", "purple", "yellow"])
    #choose a random color in the list.

    #Create a circle with a random size and location.
    x0 = randint(0, size)
    y0 = randint(0, size)
    d = randint(0, size/5)

    canvas.create_oval(x0, y0, x0 + d, y0 + d, fill=col) #Draws the circle.
    window.update()