int buttonPin = 10;    // Pin connected to the button
int led1Pin = 5;      // Pin connected to LED1
int led2Pin = 2;      // Pin connected to LED2
int sensor = A0;

bool buttonState = LOW;              // Current state of the button
bool previousButtonState = LOW;      // Previous state of the button
bool led1State = LOW;                // Current state of LED1
bool led2State = LOW;                // Current state of LED2
int sensordata = 0;
bool check = LOW; 

unsigned long buttonPressTime = 0;    // Time when the button was pressed

const unsigned long led1OnTime =3000;   // LED1 on time in milliseconds
const unsigned long led2OnTime = 15000;  // LED2 on time in milliseconds

void setup() {
  pinMode(buttonPin, INPUT_PULLUP);    // Set the button pin as input with internal pull-up resistor
  pinMode(led1Pin, OUTPUT);            // Set LED1 pin as output
  pinMode(led2Pin, OUTPUT);            // Set LED2 pin as output
}

void loop() {
  buttonState = digitalRead(buttonPin);   // Read the state of the button
sensordata = analogRead(sensor);

  // Check if the button is pressed and the previous state was not pressed
  if (buttonState == LOW && previousButtonState == HIGH) {
    buttonPressTime = millis();   // Record the button press time
    led1State = HIGH;             // Turn on LED1
  }

  // Check if the LED1 on time has passed
  if (led1State == HIGH && millis() - buttonPressTime >= led1OnTime) {
    led1State = LOW;   // Turn off LED1
    led2State = HIGH;  // Turn on LED2
    check = HIGH; 
  }
  // Check if the LED2 on time has passed
  if (led2State == HIGH && millis() - buttonPressTime >= led1OnTime + led2OnTime) {
       // Turn off LED2
 led2State = LOW;
  check = LOW; 
  }else{
     if(sensordata >800 && check == HIGH){
led2State = LOW;
    }
    if(sensordata <400 && check == HIGH){
led2State =HIGH ;
    }
    
  }
    
  

  digitalWrite(led1Pin, led1State);   // Update LED1 state
  digitalWrite(led2Pin, led2State);   // Update LED2 state

  previousButtonState = buttonState;   // Update previous button state
}