#define ECHO_PIN 5
#define TRIG_PIN 4
#define ledMerah 8
#define ledKuning 7
#define ledHijau 6
#define ledBirutua 13
#define ledUngu 12
#define ledOrange 11
#define ledBirumuda 10

void setup() {
  Serial.begin (115200);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(ledMerah, OUTPUT);
  pinMode(ledKuning, OUTPUT);
  pinMode(ledHijau, OUTPUT);
}

float readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn (ECHO_PIN, HIGH);
  return duration * 0.034 / 2;
}

void loop() {
  float distance = readDistanceCM();

  Serial.print("Measured distance: ");
  Serial.println(readDistanceCM());

  if(distance <= 50){
    digitalWrite(ledMerah, HIGH);
    digitalWrite(ledKuning, LOW);
    digitalWrite(ledHijau, LOW);
    digitalWrite(ledBirutua, LOW);
    digitalWrite(ledUngu, LOW);
    digitalWrite(ledOrange, LOW);
    digitalWrite(ledBirumuda, LOW);
  }
  else if(distance <= 100){
    digitalWrite(ledMerah, LOW);
    digitalWrite(ledKuning, HIGH);
    digitalWrite(ledHijau, LOW);
    digitalWrite(ledBirutua, LOW);
    digitalWrite(ledUngu, LOW);
    digitalWrite(ledOrange, LOW);
    digitalWrite(ledBirumuda, LOW);
  }
  else if(distance <= 150){
    digitalWrite(ledMerah, LOW);
    digitalWrite(ledKuning, LOW);
    digitalWrite(ledHijau, LOW);
    digitalWrite(ledBirutua, HIGH);
    digitalWrite(ledUngu, LOW);
    digitalWrite(ledOrange, LOW);
    digitalWrite(ledBirumuda, LOW);
  }
  else if(distance <=200){
    digitalWrite(ledMerah, LOW);
    digitalWrite(ledKuning, LOW);
    digitalWrite(ledHijau, LOW);
    digitalWrite(ledBirutua, LOW);
    digitalWrite(ledUngu, HIGH);
    digitalWrite(ledOrange, LOW);
    digitalWrite(ledBirumuda, LOW);
  }  
  else if(distance <=250){
    digitalWrite(ledMerah, LOW);
    digitalWrite(ledKuning, LOW);
    digitalWrite(ledHijau, LOW);
    digitalWrite(ledBirutua, LOW);
    digitalWrite(ledUngu, LOW);
    digitalWrite(ledOrange, HIGH);
    digitalWrite(ledBirumuda, LOW);
  }
  else if(distance <= 300){
    digitalWrite(ledMerah, LOW);
    digitalWrite(ledKuning, LOW);
    digitalWrite(ledHijau, LOW);
    digitalWrite(ledBirutua, LOW);
    digitalWrite(ledUngu, LOW);
    digitalWrite(ledOrange, LOW);
    digitalWrite(ledBirumuda, HIGH);
  }


  else{
    digitalWrite(ledMerah, LOW);
    digitalWrite(ledKuning, LOW);
    digitalWrite(ledHijau, HIGH);
    digitalWrite(ledBirutua, LOW);
    digitalWrite(ledUngu, LOW);
    digitalWrite(ledOrange, LOW);
    digitalWrite(ledBirumuda, LOW);

}
  delay(100);
}