int ECHO_PIN1 = 2;
int TRIG_PIN1 = 3;
int ECHO_PIN2 = 4;
int TRIG_PIN2 = 5;
int ledm = 13;
int ledh = 12;
int jarak1, jarak2, tahan1, tahan2;

void setup() {
  Serial.begin(115200);
  pinMode(ledm, OUTPUT);
  pinMode(ledh, OUTPUT);
  pinMode(TRIG_PIN1, OUTPUT);
  pinMode(ECHO_PIN1, INPUT);
  pinMode(TRIG_PIN2, OUTPUT);
  pinMode(ECHO_PIN2, INPUT);
}

void jaraknya1() {
  digitalWrite(TRIG_PIN1, LOW);
  delayMicroseconds(2);

  digitalWrite(TRIG_PIN1, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN1, LOW);

  int duration1 = pulseIn(ECHO_PIN1, HIGH);

  jarak1 = duration1 * 0.0343 / 2;

  Serial.print("Jarak1: ");
  Serial.println(jarak1);
}

void jaraknya2() {
  digitalWrite(TRIG_PIN2, LOW);
  delayMicroseconds(2);

  digitalWrite(TRIG_PIN2, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN2, LOW);

  int duration2 = pulseIn(ECHO_PIN2, HIGH);
  jarak2 = duration2 * 0.0343 / 2;

  Serial.print("Jarak2: ");
  Serial.println(jarak2);
}

void loop() {
  jaraknya1();
  jaraknya2();

  //if(jarak1 < 50){}
  //if(jarak2 < 50){}

  if (jarak1 < 50) {
    tahan1=1;
  }

  if (tahan1 == 1 && jarak2 < 50 ) {
    digitalWrite(ledm, HIGH);
    delay(2000);
    digitalWrite(ledm, LOW);
  }

  //////

  if (jarak2 < 50) {
    tahan2=1;
  }

  if (tahan2 == 1 && jarak1 < 50 ) {
    digitalWrite(ledh, HIGH);
    delay(2000);
    digitalWrite(ledh, LOW);
  }

  if(tahan1==1 && tahan2==1 && jarak2>50 && jarak1>50){
    tahan1=0;
    tahan2=0;
  }

}