.......Heart following 

                                                                                                                 كود بعنوان " احنا اللي خلينا القلب يتكلم " 

I made the code to control the action of heart, for the first feature, you will see the name of touched part in heart and listen the sound of heart 

1- including the library of LCD 12C and speaker library  "DFRobotDFPlayerMini.h"

#include <Wire.h>

#include <LiquidCrystal_I2C.h>

#include "Arduino.h"

#include "DFRobotDFPlayerMini.h"

2- defining each part with its pin by adding integrs for each part 

int right_ventricle = 3;  // Arduino pin connected to LED's pin

int left_ventricle = 6;   // Arduino pin connected to LED's pin

int right_atrium = 2;     // Arduino pin connected to LED's pin

int left_atrium = 5;

3- select the pin which you connected the rx and tx in speaker, and to make sure it's working, make a Fbserial   

#if (defined(ARDUINO_AVR_UNO) || defined(ESP8266))  // Using a soft serial port

#include <SoftwareSerial.h>

SoftwareSerial softSerial(/*rx =*/10, /*tx =*/11);

#define FPSerial softSerial

#else

#define FPSerial Serial1

#endif 

3- in void setup, selsct the serial,begin and serial print to check if it's work or not 

#if (defined ESP32)

  FPSerial.begin(9600, SERIAL_8N1, /*rx =*/D3, /*tx =*/D2);

#else

  FPSerial.begin(9600);

#endif

  Serial.println();

  Serial.println(F("DFRobot DFPlayer Mini Demo"));          

  Serial.println(F("Initializing DFPlayer ... (May take 3~5 seconds)"));     to initialize the speaker after 3to 5 sec 

4- so add the function to make action if it's not working, print the message 

if (!myDFPlayer.begin(FPSerial, /*isACK = */ true, /*doReset = */ true)) {  //Use serial to communicate with mp3.

    Serial.println(F("Unable to begin:"));

    Serial.println(F("1.Please recheck the connection!"));

    Serial.println(F("2.Please insert the SD card!"));

    while (true) {

      delay(0);  // Code to compatible with ESP8266 watch dog.

5- define inputs and outputs, by write pinmode for every part which compensation in the word in previous step, and write its input or output 

Serial.begin(9600);

  lcd.init();  // initialize serial        to initialize the LCD

  //turn on the backlight and print the message

  lcd.backlight();                         to turn on the backlight of LCD 

  lcd.setCursor(0, 0);                     to choose the area in LCD

  lcd.print("start ");                     write ' start the journey'

  lcd.setCursor(0, 1);                     

  lcd.print(" the journey");

  pinMode(right_ventricle, INPUT);  // set arduino pin to input mode

  pinMode(left_ventricle, INPUT);

  pinMode(right_atrium, INPUT);

  pinMode(left_atrium, INPUT);

4- in void loop make a loop to take action (LCD appears name) when any part is be touched and the speaker plays at the certain sound 

add integres to 4 parts with digital read so in the functions I'll use the name of part nor digitalread 

int touch_R_ventricle = digitalRead(right_ventricle);  // read new state

  int touch_L_ventricle = digitalRead(left_ventricle);

  int touch_R_atrium = digitalRead(right_atrium);

  int touch_L_atrium = digitalRead(left_atrium);

if (touch_L_atrium == HIGH) {            if I touch the left atrium 

    Serial.println("The sensor is being touched");     the serial will print that the sensor is being touched

    lcd.clear();                clear the screen after the phrase of ' start the journey'

    lcd.setCursor(0, 0);        select the new area

    lcd.print("the left atrium");    and LCD appears the name of touched part 'the left atrium'

         myDFPlayer.volume(30);  //Set volume value. From 0 to 30      to select the volume of sound from 0 to 30 

    myDFPlayer.play(1);     //Play the first mp3                   choose the number of sound you want to play it 

and so on in all touched parts