#define buttonUP 45
#define buttonCN 8
#define buttonDN 19
#define buttonLT 20
#define buttonRT 48

void setup() {
  Serial.begin(9600);
  pinMode(buttonUP, INPUT_PULLDOWN); 
  pinMode(buttonCN, INPUT_PULLDOWN); 
  pinMode(buttonDN, INPUT_PULLDOWN);
  pinMode(buttonLT, INPUT_PULLDOWN);
  pinMode(buttonRT, INPUT_PULLDOWN);
}

void loop() {
  if (digitalRead(buttonUP))
    Serial.println("UP");
  if (digitalRead(buttonDN))
    Serial.println("DOWN");
  if (digitalRead(buttonRT))
    Serial.println("RIGHT");
  if (digitalRead(buttonLT))
    Serial.println("LEFT");
  if (digitalRead(buttonCN))
    Serial.println("CENTER");
  delay(300);
}