allow to simulate ultrasound sensor with keyboard up and down keys
allow to simulate ultrasound sensor with keyboard up and down keys

tanel/processing_ultrasonic_animation,tanel/processing_ultrasonic_animation,tanel/processing_ultrasonic_animation,tanel/processing_ultrasonic_animation,tanel/processing_ultrasonic_animation,tanel/processing_ultrasonic_animation,tanel/processing_ultrasonic_animation