//const int LED_BUILTIN = 2;
const int merah1 = 2;
const int kuning1 = 4;
const int hijau1 = 19;

const int merah2 = 21;
const int kuning2 = 22;
const int hijau2 = 23;

const int trigPin = 18;
const int echoPin = 5;

void setup() {
  // put your setup code here, to run once:
//  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(9600);
  pinMode(merah1, OUTPUT);
  pinMode(kuning1, OUTPUT);
  pinMode(hijau1, OUTPUT);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, OUTPUT);


  pinMode(merah2, OUTPUT);
  pinMode(kuning2, OUTPUT);
  pinMode(hijau2, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
//  digitalWrite(LED_BUILTIN, HIGH);
  digitalWrite(merah1, HIGH);
  digitalWrite(kuning1, LOW);
  digitalWrite(hijau2, HIGH);
  digitalWrite(merah2, LOW);
  delay(5000);
  if (detectMove()){
    digitalWrite(hijau2, LOW);
    dimKuning2();
    digitalWrite(merah2, HIGH);
    delay(500);
    digitalWrite(hijau1, HIGH);
  } else{
    digitalWrite(hijau2, LOW);
    dimKuning2();
    digitalWrite(kuning2, LOW);
    digitalWrite(merah2, HIGH);
    digitalWrite(merah1, LOW);
    digitalWrite(hijau1, HIGH);
  }
  delay(5000);
  if (detectMove()){
    digitalWrite(hijau1, LOW);
    dimKuning1();
    digitalWrite(merah1, HIGH);
    delay(500);
    digitalWrite(hijau2, HIGH);
  }
  delay(5000);

  digitalWrite(hijau1, LOW);
  dimKuning1();
}

void dimKuning1(){
  for(int i=0; i<3; i++){
    digitalWrite(kuning1, HIGH);
    delay(500);
    digitalWrite(kuning1, LOW);
    delay(500);
  }
}

void dimKuning2(){
  for(int i=0; i<3; i++){
    digitalWrite(kuning2, HIGH);
    delay(500);
    digitalWrite(kuning2, LOW);
    delay(500);
  }
}

bool detectMove(){
  long duration, distance;
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration/2) / 29.1;
  Serial.println(distance);
  if (distance <= 30){
//    if (traffic == 1){
////      digitalWrite(hijau2, LOW);
////      dimKuning();
////      digitalWrite(merah2, HIGH);
////      delay(500);
////      digitalWrite(hijau1, HIGH);
//    }
    return true;
  }
  else{
    return false;
  }
//  delay(1000);
}