char Trig[] = {5,19};
char Echo[] = {2,4};
#define Buzzer 14
#define GreenLED 27
#define RedLED 26

void setup() {
  Serial.begin(115200);
  for(int i = 0; i < 2; i++){
    pinMode(Trig[i], OUTPUT);
    pinMode(Echo[i], INPUT);
  }
  pinMode(GreenLED, OUTPUT);
  pinMode(RedLED, OUTPUT);
  pinMode(Buzzer, OUTPUT);
  noTone(Buzzer);
}

void loop() {
 UltraSonic();
}
void UltraSonic(){
  for(int i =0; i < 2; i++){
    long duration, distance;

    digitalWrite(Trig[i], LOW);
    delayMicroseconds(2);
    digitalWrite(Trig[i], HIGH);
    delayMicroseconds(10);
    digitalWrite(Trig[i], LOW);

    duration = pulseIn(Echo[i], HIGH);
    distance =(duration / 2) / 29.1;

    Serial.println("Distance " + String(i+1) + " : " + String(distance) + "cm");

   if (distance > 0 && distance <= 50) {
      Serial.println("Youe Dead");
      delay(1000);
      for (int j = 0; j < 5; j++) {
        tone(Buzzer, 1000); 
        delay(200);
        noTone(Buzzer);
        delay(200);
        }
        digitalWrite(RedLED, HIGH);
        digitalWrite(GreenLED, LOW);

      } else if(distance <= 100){
        Serial.println("Dead zone");
        delay(1000);
      for (int j = 0; j < 3; j++) { 
        tone(Buzzer, 500);
        delay(400);
        noTone(Buzzer);
        delay(400);
      }
      digitalWrite(RedLED, HIGH);
      digitalWrite(GreenLED, LOW);
    } else {
      Serial.println("Self zone");
      delay(1000);
      noTone(Buzzer);
      digitalWrite(RedLED, LOW);
      digitalWrite(GreenLED, HIGH);
    }
  }
}