Orbitt's Basic Text Encrypter

#-------------------------------------------------------------------------------
# --- --- --- --- --- --- --- ORBITS TEXT ENCRYPTER --- --- --- --- --- --- ---
#-------------------------------------------------------------------------------

done = False
while not done:
    choice = input("Would you like to encrypt or decrypt? enter e/d = ")
    if choice == "e":
        plain_text = input("Enter the text you'd like encrypted = ")
        print("\n")
        encrypted_text = ""
        for c in plain_text:
            x = ord(c)
            x = x + 1
            c2 = chr(x)
            encrypted_text = encrypted_text + c2
        print(encrypted_text)
        print("\n")

    elif choice == "d":
        encrypted_text = input("Enter the text you'd like to decrypt = ")
        plain_text = ""
        for c in encrypted_text:
            x = ord(c)
            x = x - 1
            c2 = chr(x)
            plain_text = plain_text + c2
            print(plain_text)
            print("\n")
        else:
            print("DONE!")
    areyoudone = input("Are you done using the encrypter? y/n = ")
    if areyoudone == "y":
        done = True
        print("Thanks for using Orbitt's Encryption Service have a nice day!")
    elif areyoudone == "n":
        done = False

    else:
        done = False