def start(self, name):
        '''
        End the current behaviour and run a named behaviour.

        :param name: the name of the behaviour to run
        :type name: str
        '''
        d = self.boatd.post({'active': name}, endpoint='/behaviours')
        current = d.get('active')
        if current is not None:
            return 'started {}'.format(current)
        else:
            return 'no behaviour running'
End the current behaviour and run a named behaviour.

        :param name: the name of the behaviour to run
        :type name: str