void setup() {
  // put your setup code here, to run once:

  pinMode(4, INPUT);
  pinMode(5, INPUT);

  Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:

  if (digitalRead(5) == HIGH) {
    Serial.println("d5 pressed");
  }
  else if (digitalRead(4) == HIGH) {
    Serial.println("d4 pressed");
  }

  delay(100);
}