// Blink LED on pin 13, read analog input from A0, and print to Serial

void setup() {
  pinMode(13, OUTPUT);        // Set pin 13 as output
  Serial.begin(115200);         // Start serial communication at 9600 baud
}

void loop() {
  digitalWrite(13, HIGH);     // Turn the LED on
  int analogValue = analogRead(A0);  // Read analog value from A0
  Serial.print("LED ON - Analog Value: ");
  Serial.println(analogValue);       // Print the analog value
  delay(1000);                // Wait 1 second

  digitalWrite(13, LOW);      // Turn the LED off
  analogValue = analogRead(A0);      // Read analog again
  Serial.print("LED OFF - Analog Value: ");
  Serial.println(analogValue);       // Print the analog value
  delay(1000);                // Wait 1 second
}