#include <Keypad.h>
    #include <Keyboard.h>
    
    
    const byte ROWS = 7; //four rows
    const byte COLS = 6; //four columns
    //define the cymbols on the buttons of the keypads
    char hexaKeys[ROWS][COLS] = {
      {'w','i','1','7','c','v'},
      {'a','j','2','8','m','u'},
      {'s','k','3','9',',','.'},
      {'d','l','4','0','z','x'},
      {'e','h','5','t','b','g'},
      {'q','n','6','r','y','o'},
      {' ',' ','[',']'}
    };
    byte rowPins[ROWS] = {6, 5, 4, 3, 2, 1, 0}; //connect to the row pinouts of the keypad
    byte colPins[COLS] = {16, 15, 14, 9, 8, 7}; //connect to the column pinouts of the keypad
    
    //initialize an instance of class NewKeypad
    Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); 
    
    void setup(){
      
      Serial.begin(9600);
    }
    
      
    void loop(){
      char customKey = customKeypad.getKey();  //figure out which key
        
      if(customKey == 'y') {
        Keyboard.press(8); //8 is ASCII code for backspace
        delay(100);
        Keyboard.releaseAll();
    } else if(customKey == 'o'){
        Keyboard.press(' ');
        delay(100);
        Keyboard.releaseAll();
    }else if(customKey) { 
        Keyboard.press(customKey);
        delay(100);
        Keyboard.releaseAll();
        delay(10);
        
    }
    
     }