//variabel
int lamp1 = 4;
int lamp2 = 2;
int trig = 13;
int echo = 12;
long durasi, jarak;

void setup() {

  //sensor
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  //lampu
  pinMode(lamp1, OUTPUT);
  pinMode(lamp2, OUTPUT);


  //lcd
 
}
void loop() {
  //set up sensor
  digitalWrite(trig, LOW);
  delayMicroseconds(8);
  digitalWrite(trig, HIGH);
  delayMicroseconds(8);
  digitalWrite(trig, LOW);
  delayMicroseconds(8);
  //cara kerja sensor
  durasi = pulseIn(echo, HIGH); // menerima suara ultrasonic
  jarak = (durasi / 2) / 29.1; // menentukan jarak ultrasonic

  if (jarak < 10) {
    digitalWrite(lamp1, HIGH);
    digitalWrite(lamp2, LOW);

  } else if (jarak > 100) {
    digitalWrite(lamp1, HIGH);
    digitalWrite(lamp2, LOW);

  } else if (jarak > 10 && jarak < 100 ) {
    digitalWrite(lamp1, LOW);
    digitalWrite(lamp2, HIGH);
  } 

}