"""Joonejärgija."""
from PiBot import PiBot
robot = PiBot()


speed = 13
sleep = 0.01
color = 500
while True:
    """Umbes sada on must ja 900 valge."""
    if robot.get_second_line_sensor_from_left() < color:
        robot.set_left_wheel_speed(0)
        robot.set_right_wheel_speed(speed)
        robot.sleep(sleep)
    elif robot.get_second_line_sensor_from_right() < color:
        robot.set_right_wheel_speed(0)
        robot.set_left_wheel_speed(speed)
        robot.sleep(sleep)
    elif robot.get_third_line_sensor_from_left() < color and robot.get_third_line_sensor_from_right() < color:
        robot.set_wheels_speed(speed)
        robot.sleep(sleep)