def line(self, sentences, line_number=None):
        """ Return the bytes for a basic line.
        If no line number is given, current one + 10 will be used
        Sentences if a list of sentences
        """
        if line_number is None:
            line_number = self.current_line + 10
        self.current_line = line_number

        sep = []
        result = []
        for sentence in sentences:
            result.extend(sep)
            result.extend(self.sentence_bytes(sentence))
            sep = [ord(':')]

        result.extend([ENTER])
        result = self.line_number(line_number) + self.numberLH(len(result)) + result

        return result
Return the bytes for a basic line.
        If no line number is given, current one + 10 will be used
        Sentences if a list of sentences