const int led1 = 2;         
const int led2 = 3;         
const int led3 = 4;         
const int buzzer = 5;       
const int ldrPin = A0;      
const int switchPin = 6;   
bool alarmOn = false;       

void setup() {
    pinMode(led1, OUTPUT);
    pinMode(led2, OUTPUT);
    pinMode(led3, OUTPUT);
    pinMode(buzzer, OUTPUT);
    pinMode(switchPin, INPUT_PULLUP); 
}

void loop() {
    if (digitalRead(switchPin) == LOW) {
        alarmOn = !alarmOn; 
        delay(200); 
    }
    int ldrValue = analogRead(ldrPin);
    
    if (ldrValue > 150 && alarmOn) {
        activateAlarm(); 
    } else {
        deactivateAlarm();
    }
}

void activateAlarm() {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(buzzer, HIGH);
    delay(500);
    
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(buzzer, LOW);
    delay(500);
}

void deactivateAlarm() {
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(buzzer, LOW);
}