360 degres Servo don't want to move

Hello. Our team want to use 360 servo to control “robotic hand” exacly 2 of them as 2 fingers. We try to programm this but servo move only one rotation() ? or something like that.
there’s some code

public Servo lewy = new Servo(8);
public Servo prawy = new Servo(9);

and we try also
and nothing happened