import logging

# Configure logging
logging.basicConfig(filename='errors.txt', level=logging.ERROR, filemode='a')

def separator():
    with open("errors.txt", "a") as file:
        file.write("\n*********\n\n")

try:
    # Code that may raise an exception
    # ...
    x = 10 / 0  # Example division by zero error
except Exception as e:
    logging.exception(str(e))
    separator()