This script generates a new encryption key, initializes a Fernet object with the key, and then loops through all files in the current directory. For each file, it reads the contents, encrypts them using the Fernet object, and then writes the encrypted contents back to the file. Finally, it prints the encryption key and a message indicating that all files have been encrypted. Note that the encryption key should be kept secret and secure, as it is required to decrypt the files.