#define echoPin 7;
#define trigPin 8;

long duration;
long distance;


void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(echoPin, INPUT);
pinMode(trigPin, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(trigPin, LOW);
delayMicroseconds(2);

digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);

duration = pulseIn(echoPin, HIGH);
distance = duration/58.2;

Serial.print("Distance: ");
Serial.print(distance);
Serial.println(" cm");
delay(50);
}