#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

void setup() {
  Serial.begin(115200);
  pinMode(13, OUTPUT);
  lcd.begin(16, 2);
  lcd.print("no sound :(");
}

void loop() {
  int sample = analogRead(A0);
  Serial.println(sample);
  digitalWrite(13, abs(sample - 512) > 50);

  if (abs(sample - 512) > 50) { // If sound is detected
    lcd.clear(); // Clear the LCD
    lcd.setCursor(0, 0); // Set cursor to the first line
    lcd.print("I hear you!"); // Print the message
    delay(1000); // Wait for a moment
    lcd.clear(); // Clear the message
    lcd.setCursor(0, 0); // Set cursor back to the first line
    lcd.print("no sound :("); // Print the default message
  }
}