#include "Keyboard.h"
#include <Keypad.h>
void setup() {
  // put your setup code here, to run once:
  pinMode(A0, INPUT);
  pinMode(6,INPUT);
  pinMode(7,INPUT);
  pinMode(8,INPUT);
  pinMode(9,INPUT);
  pinMode(4,OUTPUT);
  pinMode(5,OUTPUT);
  pinMode(A3,OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  
  if (digitalRead(A0) ==HIGH  or digitalRead(18)==HIGH){
    Serial.println("hello");
    
    
  }

  digitalWrite(4, HIGH);
  if (digitalRead(6) == HIGH){
    Serial.println("A key was pressed in row one, column one");
    delay(100);
  }
  digitalWrite(4,LOW);
  digitalWrite(5,HIGH);
  if (digitalRead(7) == HIGH){
    Serial.println("A key was pressed in row two, column two");
    delay(100);
  }
}