music controller

/*
  KeyboardControl for music controller
  tangible workshop's assignments - wed
  using https://www.arduino.cc/en/Reference/KeyboardModifiers
  https://www.arduino.cc/en/Reference/ASCIIchart
  inspired by Tom Igoe
  and help from Regina and Sebastian <3 
*/

#include "Keyboard.h"
// set pin numbers for the six buttons:
char first = 51;
char second = 53;
char third = 50;
char fourth = 49;
char fifth = 54;
char sixth = 52;


//check to see if the bottom release on time
bool firstUp = LOW;
bool secondUp = LOW;
bool thirdUp = LOW;
bool fourthUp = LOW;
bool fifthUp = LOW;
bool sixthUp = LOW;

void setup() { // initialize the buttons' inputs:
  pinMode(2, INPUT);
  pinMode(3, INPUT);
  pinMode(4, INPUT);
  pinMode(5, INPUT);
  pinMode(6, INPUT);
  pinMode(7, INPUT);




  Serial.begin(9600);

  Keyboard.begin();
}

void loop() {



  // use the pushbuttons to control the keyboard:

  if (digitalRead(2) == HIGH) {
    if (firstUp == LOW) {
      //press
      Keyboard.press(first);
      firstUp = HIGH;
      delay (50);
    }
  } else {
    if (firstUp == HIGH) {
      //releasing
      Keyboard.releaseAll();
      firstUp = LOW;
      delay (50);
    }
  }


    if (digitalRead(3) == HIGH) {
      if (secondUp == LOW) {
        //press
        Keyboard.press(second);
        secondUp = HIGH;
        delay (50);
      }
    } else {
      if (secondUp == HIGH) {
        //releasing
        Keyboard.releaseAll();
        secondUp = LOW;
        delay (50);
      }
    }

      if (digitalRead(4) == HIGH) {
        if (thirdUp == LOW) {
          //press
          Keyboard.press(third);
          thirdUp = HIGH;
          delay (50);
        }
      } else {
        if (thirdUp == HIGH) {
          //releasing
          Keyboard.releaseAll();
          thirdUp = LOW;
          delay (50);
        }
      }

        if (digitalRead(5) == HIGH) {
          if (fourthUp == LOW) {
            //press
            Keyboard.press(fourth);
            fourthUp = HIGH;
            delay (50);
          }
        } else {
          if (fourthUp == HIGH) {
            //releasing
            Keyboard.releaseAll();
            fourthUp = LOW;
            delay (50);
          }
        }

          if (digitalRead(6) == HIGH) {
            if (fifthUp == LOW) {
              //press
              Keyboard.press(fifth);
              fifthUp = HIGH;
              delay (50);
            }
          } else {
            if (fifthUp == HIGH) {
              //releasing
              Keyboard.releaseAll();
              fifthUp = LOW;
              delay (50);
            }
          }

            if (digitalRead(7) == HIGH) {
              if (sixthUp == LOW) {
                //press
                Keyboard.press(sixth);
                sixthUp = HIGH;
                delay (50);
              }
            } else {
              if (sixthUp == HIGH) {
                //releasing
                Keyboard.releaseAll();
                sixthUp = LOW;
                delay (50);
              }
            }
          }