void setup()
{
  pinMode(5, INPUT_PULLUP);

  Serial.begin(9600);
  Keyboard.begin();
}

void loop()
{
    if(digitalRead(5)==LOW){
    Keyboard.press('d');
    Serial.print(5);
      delay(80);}
    if(digitalRead(5)!=LOW){
      Keyboard.release('d');
      delay(80);}

}