Arduino Magnus

//Arvuti #1
int A1IN = 2;
int A1OUT = 8;

//Arvuti #2
int A2IN = 3;
int A2OUT = 9;

//Arvuti #3
int A3IN = 4;
int A3OUT = 10;

//Arvuti #4
int A4IN = 5;
int A4OUT = 11;

void setup() {
  //Arvuti #1
  pinMode(A1IN, INPUT);
  pinMode(A1OUT, OUTPUT);

  //Arvuti #2
  pinMode(A2IN, INPUT);
  pinMode(A2OUT, OUTPUT);

  //Arvuti #3
  pinMode(A3IN, INPUT);
  pinMode(A3OUT, OUTPUT);

  //Arvuti #4
  pinMode(A4IN, INPUT);
  pinMode(A4OUT, OUTPUT);

  Serial.begin(9600);
  Serial.println("Magnus Vaarikas ja muu sitt");
}

void loop() {
  //Arvuti #1
  Serial.print("Pin ");
  Serial.print(A1IN);
  Serial.print(": ");
  Serial.print(digitalRead(A1IN));
  Serial.print(", ");

  //Arvuti #2
  Serial.print("Pin ");
  Serial.print(A2IN);
  Serial.print(": ");
  Serial.print(digitalRead(A2IN));
  Serial.print(", ");

  //Arvuti #3
  Serial.print("Pin ");
  Serial.print(A3IN);
  Serial.print(": ");
  Serial.print(digitalRead(A3IN));
  Serial.print(", ");

  //Arvuti #4
  Serial.print("Pin ");
  Serial.print(A4IN);
  Serial.print(": ");
  Serial.print(digitalRead(A4IN));

  Serial.println();



  //Arvuti #1
  if (digitalRead(A1IN) == 1) {
    digitalWrite(A1OUT, HIGH);
  } else {
    digitalWrite(A1OUT, LOW);
  }

  //Arvuti #2
  if (digitalRead(A2IN) == 1) {
    digitalWrite(A2OUT, HIGH);
  } else {
    digitalWrite(A2OUT, LOW);
  }

  //Arvuti #3
  if (digitalRead(A3IN) == 1) {
    digitalWrite(A3OUT, HIGH);
  } else {
    digitalWrite(A3OUT, LOW);
  }

  //Arvuti #4
  if (digitalRead(A4IN) == 1) {
    digitalWrite(A4OUT, HIGH);
  } else {
    digitalWrite(A4OUT, LOW);
  }
}