def error(message, level="error", exit_code=1, **kwargs):
    kwargs["fg"] = kwargs.get("fg", "red")
    click.secho(u"error: {}".format(message), **kwargs)
    sys.exit(exit_code)
def _get(delta, start):
            p = start
            while delta:
                p = p.next
                delta -= 1
            return p.val