#include "DigiKeyboard.h"

int Led = 1 ;// define LED Interface
int buttonpin = 0; // define the photo interrupter sensor interface
int val ;// define numeric variables val
void setup ()
{
  pinMode (Led, OUTPUT) ;// define LED as output interface
  pinMode (buttonpin, INPUT) ;// define the photo interrupter sensor output interface
}
void loop ()
{
  val = digitalRead (buttonpin) ;// digital interface will be assigned a value of 3 to read val
  if (val == HIGH) // When the light sensor detects a signal is interrupted, LED flashes
  {
    digitalWrite (Led, HIGH);
    DigiKeyboard.sendKeyStroke(0);
    DigiKeyboard.println(",");
    DigiKeyboard.delay(200);
    DigiKeyboard.sendKeyStroke(0);
    DigiKeyboard.println(".");
  }
  else
  {
    digitalWrite (Led, LOW);
  }
}