Periodic array of bistable rotational elements (polarization angle ) coupled to nearest neighbors by elastic bands [287]. The combination of an excentrically attached linear spring and the action of gravity results in a tunable bistable potential ψ which can be biased as in domain switching (by tilting the whole setup by an angle α) and which can also mimic a second-order phase transition (by adjusting the position fx of the spring anchor points, switching between a bistable potential and a single-well potential).