#include <HCSR04.h>

//Initialize sensor that uses Attiny44 PB0 for Trigger (ie. Audrino pin 10）
//and PB1 for Echo (ie. Audrino pin 9).
UltraSonicDistanceSensor distanceSensor(10, 9);  

void setup () {
    // We initialize serial connection so that we could print values from sensor.
    Serial.begin(9600);  
}

void loop () {
    // Every 500 miliseconds, do a measurement using the sensor 
    //and print the distance in centimeters.
    Serial.print("Distance: ");
    Serial.println(distanceSensor.measureDistanceCm());
    delay(500);
}