#include <LiquidCrystal_I2C.h>
#include <Wire.h>

LiquidCrystal_I2C lcd(0x27,16,2);
int but1= 2;
int but2= 3;
int but3= 4;
int but4= 5;
int but5= 6;
int but6= 7;
int but7= 8;
int but8= 9;

const int ledPin1 = 0; 
const int ledPin2 = 1; 
const int ledPin3 = 10; 
const int ledPin4 = 11; 
const int ledPin5 = 12; 
const int ledPin6 = A0;
const int ledPin7 = A1; 
const int ledPin8 = A2;

int buzzer=13;
void setup()
{
  pinMode(but1, INPUT);
  pinMode(but2, INPUT);
  pinMode(but3, INPUT);
  pinMode(but4, INPUT);
  pinMode(but5, INPUT);
  pinMode(but6, INPUT);
  pinMode(but7, INPUT);
  pinMode(but8, INPUT);
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);
  pinMode(ledPin4, OUTPUT);
  pinMode(ledPin5, OUTPUT);
  pinMode(ledPin6, OUTPUT);
  pinMode(ledPin7, OUTPUT);
  pinMode(ledPin8, OUTPUT);

  pinMode(buzzer, OUTPUT);
  
  lcd.init();
  lcd.backlight();
  
}

void loop()
{
  int b1=digitalRead(but1);
  int b2=digitalRead(but2);
  int b3=digitalRead(but3);
  int b4=digitalRead(but4);
  int b5=digitalRead(but5);
  int b6=digitalRead(but6);
  int b7=digitalRead(but7);
  int b8=digitalRead(but8);
  digitalWrite(ledPin1, b1);
  digitalWrite(ledPin2, b2);
  digitalWrite(ledPin3, b3);
  digitalWrite(ledPin4, b4);
  digitalWrite(ledPin5, b5);
  digitalWrite(ledPin6, b6);
  digitalWrite(ledPin7, b7);
  digitalWrite(ledPin8, b8);
  lcd.setCursor(0,0);
  lcd.print("Piano");
  if(digitalRead(but1) == HIGH)
  {
    tone(buzzer,523,100);
    lcd.setCursor(0,1);
    lcd.print("0");
    delay(120);
    lcd.clear();
  }
  if(digitalRead(but2) == HIGH)
  {
    tone(buzzer,587,100);
    lcd.setCursor(0,1);
    lcd.print("1");
    delay(120);
    lcd.clear();
  }
  if(digitalRead(but3) == HIGH)
  {
    tone(buzzer,659,100);
    lcd.setCursor(0,1);
    lcd.print("2");
    delay(120);
    lcd.clear();
  }
  if(digitalRead(but4) == HIGH)
  {
    tone(buzzer,698,100);
    lcd.setCursor(0,1);
    lcd.print("3");
    delay(120);
    lcd.clear();
  }
  if(digitalRead(but5) == HIGH)
  {
    tone(buzzer,784,100);
    lcd.setCursor(0,1);
    lcd.print("4");
    delay(120);
    lcd.clear();
  }
  if(digitalRead(but6) == HIGH)
  {
    tone(buzzer,880,100);
    lcd.setCursor(0,1);
    lcd.print("5");
    delay(120);
    lcd.clear();
  }
  if(digitalRead(but7) == HIGH)
  {
    tone(buzzer,988,100);
    lcd.setCursor(0,1);
    lcd.print("6");
    delay(120);
    lcd.clear();
  }
  if(digitalRead(but8) == HIGH)
  {
    tone(buzzer,1047,100);
    lcd.setCursor(0,1);
    lcd.print("7");
    delay(120);
    lcd.clear();
  }
  delay(10); 
}