const int gasSensorPin = A0;
const int ledPin = 13;

void setup() {
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int gasLevel = analogRead(gasSensorPin);
  Serial.print("Gas Level: ");
  Serial.println(gasLevel);

  if (gasLevel > 800) {
    // Severe warning: blink rapidly
    digitalWrite(ledPin, HIGH);
    delay(100);
    digitalWrite(ledPin, LOW);
    delay(100);
  }
  else if (gasLevel > 400) {
    // Moderate warning: LED on
    digitalWrite(ledPin, HIGH);
  }
  else {
    
    digitalWrite(ledPin, LOW);
  }

  delay(100); // Short delay for stability
}