to click black pixels on a screen

#! /usr/local/bin/python3
from pykeyboard import PyKeyboard
from PIL import ImageGrab
import time

k = PyKeyboard()

def clickBlackPixels():
  while True:
    # get the screen 
    box = (20, 20, 80, 80)
    im = ImageGrab.grab(box)
    
    # get the pixels from the screen
    pixels = im.load()
    
    # get the width & height of the screen
    w, h = im.size
    
    # interate each pixel
    for i in range(w):
      for j in range(h):
        # when pixel is black
        if pixels[i, j] == 0:
          # click the pixel
          k.tap_key(k.left_key)
    
    time.sleep(0.1)
    
clickBlackPixels()