def create_comment(example):
    """Creates a comment for video, by listing the initial values of the
    example `example`.

    Args:
        example (`DoublePendulum` class instance)

    Returns:
        string
    """
    status = ['Initial conditions:']
    for i, b in enumerate((example._b1, example._b2), 1):
        s = 'Pendulum {i}: position: ({b.x:.2f}, {b.y:.2f}), mass: {b.m:.2f}'.format(i=i, b=b)
        status.append(s)
    return '\n'.join(status)