#define  pinTrig 3
#define pinEcho 2
#define pinBuz 13

long waktu, jarak;

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(pinBuz, OUTPUT);
pinMode(pinTrig, OUTPUT);
pinMode(pinEcho, INPUT);
}

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

}