python code brobots meteor

import time, math
from tkinter import *
from random import randint
width = 700
height = 700
r = 100


class Game():
    def __init__(self, width = 500, height = 500):
        self.root = Tk()
        self.root.title("Meteorits")
        self.root.resizable(False,False)
        self.canvas = Canvas(self.root, width = width, height = height, highlightthickness = 0)
        self.canvas.pack()
        self.root.update()
        self.meteors = []
        self.width = self.canvas.winfo_width()
        self.height = self.canvas.winfo_height()

    def mainloop(self):
        while True:
            for z in self.meteors:
                z.move()
            self.colision_with_borders()
            self.colision_with_meteors()
            self.root.update_idletasks()
            self.root.update()
            time.sleep(1/100)

    def get_center(self, obj1):
        obj1_x1, obj1_y1, obj1_x2, obj1_y2 = self.canvas.coords(obj1.ball)
        obj1_center = ((obj1_x2 + obj1_x1)/2, (obj1_y2 + obj1_y1)/2)
        return obj1_center

    def get_dist(self,obj1_center, obj2_center):
        kx = obj1_center[0] - obj2_center[0]
        ky = obj1_center[1] - obj2_center[1]
        g = math.sqrt(kx ** 2 + ky ** 2)
        return g


    def colision_with_meteors(self):
        remove_meteors = []
        for i in range(len(self.meteors)-1):
            for k in range(i+1,len(self.meteors)):
                i_center = self.get_center(self.meteors[i])
                k_center = self.get_center(self.meteors[k])
                if self.get_dist(i_center, k_center) <= r * 2:
                    remove_meteors.append(i)
                    remove_meteors.append(k)
        new_meteors = [self.meteors[w] for w in range(len(self.meteors)) if w not in remove_meteors]
        for i in remove_meteors:
            self.canvas.delete(self.meteors[i].ball)
        self.meteors = new_meteors

    def colision_with_borders(self):
        for i in self.meteors:
            if self.canvas.coords(i.ball)[0] < 0: self.canvas.move(i.ball, self.width, 0)
            if self.canvas.coords(i.ball)[2] > self.width: self.canvas.move(i.ball, -self.width, 0)
            if self.canvas.coords(i.ball)[1] < 0: self.canvas.move(i.ball,  0, self.height)
            if self.canvas.coords(i.ball)[3] > self.height: self.canvas.move(i.ball, 0, -self.height)


class Meteorit:
    def __init__(self, game, x, y, r):
        self.deltax = randint(-5,5)
        self.deltay = randint(-5,5)
        self.x1 = x-r
        self.y1 = y-r
        self.x2 = x+r
        self.y2 = y+r
        self.r = r
        self.game = game
        self.ball = self.game.canvas.create_oval(self.x1, self.y1, self.x2, self.y2, fill="red")

    def move(self):
        self.game.canvas.move(self.ball, self.deltax, self.deltay)




g = Game(width, height)
for i in range(50):
    x=randint(r,width-r)
    y=randint(r,height-r)
    g.meteors.append(Meteorit(g, x, y, r))

g.mainloop()