int trig = 6;
int echo = 7;
long durasi, jarak;
int merah = 4;
int kuning = 3;
int hijau = 2;
int buzzer = 5;

void setup() {
 pinMode (trig, OUTPUT);
 pinMode (echo, INPUT);
 pinMode (merah, OUTPUT);
 pinMode (kuning, OUTPUT);
 pinMode (hijau, OUTPUT);
 pinMode (buzzer, OUTPUT);
 Serial.begin (9600);
}

void loop() {
digitalWrite (trig, LOW);
delayMicroseconds (8);
digitalWrite (trig, HIGH);
delayMicroseconds (8);
digitalWrite (trig, LOW);
delayMicroseconds (8);
durasi = pulseIn(echo, HIGH);
jarak = (durasi / 2) / 29.1;
Serial.print("Jarak Benda : ");
Serial.print(jarak) ;
Serial.println(" Cm");
}