int Led1 = 12;      //initialization pin 12 in arduino as LED1 Pin (red)
int Led2 = 11;      //initialization pin 11 in arduino as LED2 Pin (yellow)
int Led3 = 10;      //initialization pin 10 in arduino as LED3 Pin (green)
int LedLdr = 13;    //initialization pin 13 in arduino as LED LDR Pin
int LdrPin = A0;    //initialization pin A0 in arduino as LDR Pin
int PirPin = 2;     //initialization pin 2 in arduino as PIR Pin
int PirStatus = 0;  //starting value of PirStatus is 0 ; mean there is no movement
int LdrState = LOW; //starting value of LdrState is Low ; mean the Pir is off use for serial print
int BuzzPin = 9;    //initialization pin 9 in arduino as Buzzer Pin
int PirState = LOW; //starting value of PirState is Low ; mean there is no movement used for serial print

void setup() {
  Serial.begin(9600);       //initializing serial begin of Arduino Uno
  pinMode(Led1, OUTPUT);    //set pin of Led1 as outuput
  pinMode(Led2, OUTPUT);    //set pin of Led2 as outuput
  pinMode(Led3, OUTPUT);    //set pin of Led3 as outuput
  pinMode(LedLdr, OUTPUT);  //set pin of LedLdr as outuput
  pinMode(LdrPin, INPUT);   //set pin of LdrPin as input
  pinMode(PirPin, INPUT);   //set pin of PirPin as input
}

void loop() {
  int LdrStatus = analogRead(LdrPin);   //LdrStatus reading analog signal from LdrPin
  int PirStatus = digitalRead(PirPin);  //PirStatus reading digital data from PirPin

  if(LdrStatus >512){             //if value of LdrStatus more than 512 (bright)
  digitalWrite(LedLdr,HIGH);      //LedLdr will high and Led will on
    if(PirStatus == HIGH){        //after check value of LdrStatus now check if PirStatus is high
      digitalWrite(Led1, HIGH);   //Led1 will high and red led will on
      digitalWrite(Led2, HIGH);   //Led2 will high and yellow led will on
      digitalWrite(Led3, HIGH);   //Led3 will high and green led will on
      tone(BuzzPin, 1000);        //BuzzPin will high and Buzzer will play sound at 1KHz
      delay(200);                 //Led1, Led2, Led3, and BuzzPin will high during 200ms
      digitalWrite(Led1, LOW);    //Led1 will low and red led will off
      digitalWrite(Led2, LOW);    //Led2 will low and yellow led will off
      digitalWrite(Led3, LOW);    //Led3 will low and green led will off
      noTone(BuzzPin);            //BuzzPin will low and Buzzer will off 
      delay(200);                 //Led1, Led2, Led3, and BuzzPin will off during 200ms
      if (PirState == LOW) {      //if PirState is Low
      Serial.println(" Hay ladrones, amigo.!!!!");  //Serial will print this
      PirState = HIGH;            //and change PirState into high so its only print 1 times 
      }
    }
    else{                         //after check value of LdrStatus now check if PirStatus is not high
      digitalWrite(Led1, LOW);    //Led1 will low and red led will off
      digitalWrite(Led2, LOW);    //Led2 will low and yellow led will off
      digitalWrite(Led3, LOW);    //Led3 will low and green led will off
      noTone(BuzzPin);            //BuzzPin will low and Buzzer will off 
      if (PirState == HIGH) {     //if PirState is High
      Serial.println("El ladrón se ha escapado, jefe.");  //Serial will print this 
      PirState = LOW;             //and change PirState into Low so its only print 1 times
      }
    }
    
    if(LdrState == LOW){          //if LdrState is Low 
    Serial.println("El sensor está encendido, amigo.");  //Serial will print this
    LdrState = HIGH;              //and change LdrState into High so its only print 1 times
    }
  }
  else{                           //if value of LdrStatus no more than 512 (dark)
    digitalWrite(LedLdr, LOW);    //LedLdr will Low and Led will off
    if(LdrState == HIGH){         //if LdrState is Low
      Serial.println("Ya es de día, el sensor está muerto.");  //Serial will print this
      digitalWrite(Led1, LOW);    //Led1 will low and red led will off
      digitalWrite(Led2, LOW);    //Led2 will low and yellow led will off
      digitalWrite(Led3, LOW);    //Led3 will low and green led will off
      LdrState = LOW;             //and change LdrState into High so its only print 1 times
    }
  }

}