const int rgbr = 13;
const int rgbg = 12;
const int rgbb = 11;
const int trig = 7;
const int echo = 6;


void setup() {
  pinMode(rgbr, OUTPUT);
  pinMode(rgbg, OUTPUT);
  pinMode(rgbb, OUTPUT);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  Serial.begin(9600);
}

void loop() {
  digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);

  long durasi = pulseIn(echo, HIGH);
  int jarak = durasi * 0.034 / 2;

  Serial.print("Jarak benda menuju sensor: ");
  Serial.println(jarak);

  if (jarak < 100) {
    digitalWrite(rgbg, HIGH);
    delay(300);
    digitalWrite(rgbg, LOW);
    delay(200);
    digitalWrite(rgbb, LOW);
    digitalWrite(rgbr, LOW);
  } else if (jarak < 250) {
    digitalWrite(rgbg, LOW);
    digitalWrite(rgbb, HIGH);
    delay(300);
    digitalWrite(rgbb, LOW);
    delay(200);
    digitalWrite(rgbr, LOW);
  } else {
    digitalWrite(rgbg, LOW);
    digitalWrite(rgbb, LOW);
    digitalWrite(rgbr, HIGH);
    delay(300);
    digitalWrite(rgbr, LOW);
    delay(200);
  }
  delay(1000);
}