const int LDR1= A4;
#define LDR2 A3
#define LDR3 A2
#define LDR4 A1

const int LED1 = 4;
#define LED2 5
#define LED3 6
#define LED4 7

#define PB1 2
#define PB2 3
#define PB3 20
#define PB4 21

bool state1 = true;
bool state2 = true;
bool state3 = true;
bool state4 = true;

void setup() {
  Serial.begin(9600);
  pinMode(LDR1,INPUT);
  pinMode(LDR2,INPUT);
  pinMode(LDR3,INPUT);
  pinMode(LDR4,INPUT);

  pinMode(LED1,OUTPUT);
  pinMode(LED2,OUTPUT);
  pinMode(LED3,OUTPUT);
  pinMode(LED4,OUTPUT);

  pinMode(PB1, INPUT);
  pinMode(PB2, INPUT);
  pinMode(PB3, INPUT);
  pinMode(PB4, INPUT);

  attachInterrupt(digitalPinToInterrupt(2),Button1,RISING);
  attachInterrupt(digitalPinToInterrupt(PB2),Button2,RISING);
  attachInterrupt(digitalPinToInterrupt(PB3),Button3,RISING);
  attachInterrupt(digitalPinToInterrupt(PB4),Button4,RISING);
  
}



void loop() {

  condition();
  Serial.println(digitalRead(PB1));
  
 
}

  void condition(){
  int value1 = analogRead(LDR1);
  int value2 = analogRead(LDR2);
  int value3 = analogRead(LDR3);
  int value4 = analogRead(LDR4);

  if(value1 < 500 && state1 == true){
    digitalWrite(LED1,HIGH);
  }
  else if (value1 >500){
    digitalWrite(LED1,LOW);
    state1 = true;
  }

  if(value2 < 500 && state2 == true){
    digitalWrite(LED2,HIGH);
  }
  else if (value2 >500){
    digitalWrite(LED2,LOW);
    state2 = true;
  }

  if(value3 < 500 && state3 == true){
    digitalWrite(LED3,HIGH);
  }
  else if (value3 >500){
    digitalWrite(LED3,LOW);
    state3 = true;
  }

  if(value4 < 500 && state4 == true){
    digitalWrite(LED4,HIGH);

  }
  else if (value4 >500){
    digitalWrite(LED4,LOW);
    state4 = true;
  }


  }
  void Button1(){
    state1 = false;
    digitalWrite(LED1,LOW);
  }

  void Button2(){
    state2 = false;
    digitalWrite(LED2,LOW);
  }

  void Button3(){
    state3 = false;
    digitalWrite(LED3,LOW);
  }

  void Button4(){
    state4 = false;
    digitalWrite(LED4,LOW);
  }