/*
  DigitalReadSerial
 Reads a digital input on pin 2, prints the result to the serial monitor

 This example code is in the public domain.
 */

// digital pin 2 has a pushbutton attached to it. Give it a name:
int pushButton1 = 4;
int pushButton2 = 5;
int pushButton3 = 6;
int pushButton4 = 7;

// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
  // make the pushbutton's pin an input:
  pinMode(pushButton1, INPUT);
  pinMode(pushButton2, INPUT);
  pinMode(pushButton3, INPUT);
  pinMode(pushButton4, INPUT);
}

// the loop routine runs over and over again forever:
void loop() {
  // read the input pin:
  int buttonState1 = digitalRead(pushButton1);
  int buttonState2 = digitalRead(pushButton2);
  int buttonState3 = digitalRead(pushButton3);
  int buttonState4 = digitalRead(pushButton4);
  
if (buttonState1 == LOW) 
   Serial.println("LEFT");
if (buttonState2 == LOW) 
  Serial.println("RIGHT");
if (buttonState3 == LOW) 
  Serial.println("FEED");
if (buttonState4 == LOW) 
 Serial.println("PEN UP");
  }