Zumi will turn to a desired angle.
turn(desired_angle, duration=1.5, max_speed=25, accuracy=1):
desired_angle: Angle to turn. Positive degrees to the left. Negative degrees to the right.
duration: Number of seconds Zumi will perform the command.
speed: The max motor speed for turning. A positive integer value between 0 and 80.
accuracy: The tolerance of +- degrees.Ex: an accuracy = 1 will be +1 or -1 degree off from desired_angle.