GUI: with using def

from tkinter import *
from random import randrange as rnd, choice
import time
'''from frame_click import *'''
root = Tk()
root.geometry('800x600')

i = 0
def click(event):
    global i
    canv.delete(oval)
    i += 1
    l1['text'] = i, 'очков'

f = Frame()
f.pack(anchor=NW)
l1 = Label(f, width=10, text='0 очков')
l2 = Label(f, width=10, text='0 очков')
l1.pack(ipadx=10, side=LEFT)
l2.pack(ipadx=600, side=LEFT)

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

colors = ['green', 'yellow', 'orange', 'lightblue', 'blue', 'pink']
def new_ball():
    global x, y, r, oval
    canv.delete(ALL)
    x = rnd(100, 700)
    y = rnd(100, 500)
    r = rnd(30, 50)
    oval = canv.create_oval(x-r, y-r, x+r, y+r, fill=choice(colors), width=0)
    canv.tag_bind(oval, '<Button-1>', click)
    root.after(2000, new_ball)

new_ball()
root.mainloop()