Ultrasonic sensor
sensors.ultrasonic4.onEvent(UltrasonicSensorEvent.ObjectDetected, function () {});
sensors.ultrasonic1.distance();
sensors.ultrasonic1.pauseUntil(UltrasonicSensorEvent.ObjectDetected);
sensors.ultrasonic4.onEvent(UltrasonicSensorEvent.ObjectDetected, function () {});
sensors.ultrasonic1.distance();
sensors.ultrasonic1.pauseUntil(UltrasonicSensorEvent.ObjectDetected);