def list_compare(original_list, new_list):
    """ Compares 'original_list' to 'new_list' and returns two new lists,
    the first of which is a list of additions to 'original_list and and the
    second is a list of items to be removed from 'original_list'. """

    add = []
    for item in new_list:
        if item not in original_list:
            add.append(item)

    rm = []
    for item in original_list:
        if item not in new_list:
            rm.append(item)

    return add, rm