def bytes_to_bits(message):
    """Convert a bytes message to a sequence of bits.

    Usage::

        print(tuple(bytes_to_bits(b'CS')))
        # => (0, 1, 0, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1)
        # 01000011 is C
        # 01010011 is S
    """
    return map(int, ''.join(format(ch, 'b').zfill(8) for ch in message))