const int sensorPin = A0; // Analog pin to read the sensor data
int sensorValue = 0; // Variable to store the sensor value

void setup() {
  pinMode(13, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // Read the sensor value
  sensorValue = analogRead(sensorPin);

  // Convert the sensor value to a percentage
  int waterLevel = map(sensorValue, 0, 1023, 0, 100);

  // Display the water level on the Serial Monitor
  Serial.print("Water level: ");
  Serial.print(waterLevel);
  Serial.println("%");

  if (waterLevel <= 20) {
    digitalWrite(13, HIGH);
  }
  else {
    digitalWrite(13, LOW);
  }

  // Wait for 500 milliseconds before reading the sensor again
  delay(500);
}