julius.py

import os
import shutil
import time

source = "C:\\Users\\juliu\\OneDrive\\Pictures\\Screenshots\\"
dest = "C:\\Users\\juliu\\Picture\\iCloud Photos\\Photos"

source_list = []

os.chdir(os.path(source))
files = [f for f in os.listdir('.') if os.path.isfile(f)]
source_list = files

while True:
    files = [f for f in os.listdir('.') if os.path.isfile(f)]
    if (files != source_list):
        files_to_copy = [f for f in os.listdir('.') if os.path.isfile(f) and f not in source_list]
        source_list = files
        for file in files_to_copy:
            shutil.copy(source + file, dest + file)

    time.sleep(15)