ScreenPixels.py

from tkinter import *
import random

pixellist = []

class Pixel:
    def __init__(self, app):
        self.window = Tk()
        self.window.config(bg=random.choice(["red", "green", "blue", "yellow", "lime", "cyan"]))
        self.window.overrideredirect(True)
        self.app = app

        self.x = 10
        self.y = 10

        self.width = 100
        self.height = 100

        self.velx = random.randint(-5000, 5000)/200
        self.vely = random.randint(-5000, 5000)/200

        pixellist.append(self)

        self.window.attributes("-topmost", True)

    def update(self):

        if self.x + self.x < 0 or self.x + self.velx + self.width > self.app.screenwidth:
            self.velx = -self.velx

        if self.y + self.y < 0 or self.y + self.vely + self.height > self.app.screenheight:
            self.vely = -self.vely

        self.x += self.velx
        self.y += self.vely

        self.window.geometry(f"{self.width}x{self.height}+{round(self.x)}+{round(self.y)}")
        self.window.update()

class ScreenPixels:
    def __init__(self):

        root = Tk()

        self.screenwidth = root.winfo_screenwidth()
        self.screenheight = root.winfo_screenheight()
        root.update()
        root.destroy()

        self.pixelamount = 10


        for i in range(self.pixelamount):
            Pixel(self)


        while True:
            for i in pixellist:
                i.update()

ScreenPixels()