№2 мячики с рамкой

from random import randrange as rnd
from tkinter import *

root = Tk()
root.geometry('400x400')
canv = Canvas(root, bg = 'white')
canv.pack(fill = BOTH, expand = 1)

class ball():
    def __init__(self):
        x = self.x = 0
        y = self.y = 0
        r = self.r = 0
        self.width = 0
        self.color = ''
        self.pen_color = ''
        self.id = canv.create_oval(x-r,y-r,x+r,y+r, width = self.width, fill = self.color, outline = self.pen_color )

    def paint(self):
        x = self.x
        y = self.y
        r = self.r
        canv.coords(self.id,x-r,y-r,x+r,y+r)
        canv.itemconfig (self.id, width = self.width, fill = self.color, outline = self.pen_color)

balls = []
for z in range(12):
    new_ball = ball()
    new_ball.x = rnd(100,300)
    new_ball.y = rnd(100,300)
    new_ball.r = rnd(10,30)
    new_ball.width = rnd(0,5)
    new_ball.pen_color = "red"
    new_ball.color = 'green'
    balls += [new_ball]

for b in balls:
    b.paint()

mainloop()