Interactive Menu, String Search?

[menator01]

Going to post one more example. This does not have the add item. Uses terminal colors.
I was going to post the output but, I could not do it in color so, I didn't.

#! /usr/bin/env python3.8
'''Docstring'''

import sys
import os


class FastFood:
    def __init__(self):
        self.menu_items = ['hamburger', 'cheese burger', 'fries', \
        'coke', 'coffee', 'tea', 'milkshake']

    def menu(self):
        return f'Menu: {", ".join(self.menu_items).title()}'

    def order(self):
        on_menu = []
        not_on_menu = []
        return_values = []

        os.system('clear')

        old_string = (f'\nOur Menu: \033[96m{", ".join(self.menu_items)}\033[00m')
        new_string = old_string.replace(',', '\033[00m,\033[96m')
        print(f'{new_string}\n')
        self.order_items = \
        input('Can I take your order?\n\033[93mSeperate multiple items with a comma.\033[00m\n: ').split(',')

        for item in self.order_items:
            if not item.strip():
                os.system('clear')
                print(f'\n\033[91m You did not order anything.\033[00m')
                sys.exit()
            if item.strip().casefold() in '\n'.join(self.menu_items).casefold():
                on_menu.append(item.strip())

            else:
                not_on_menu.append(item.strip())

        os.system('clear')
        if on_menu:
            old_string = (f'\nYour Order: \033[93m{", ".join(on_menu).title()}\033[00m')
            new_string = old_string.replace(',', '\033[00m,\033[93m')
            print(f'{new_string}')

        if not_on_menu:
            old_string = \
            (f'\nSorry, \033[91m{", ".join(not_on_menu).title()}\033[00m is not on the menu.')
            new_string = old_string.replace(',', '\033[00m,\033[91m')
            print(f'{new_string}\n')

        print()

food = FastFood()
food.order()