int p1 = 1;
int p2 = 2;
int ab1 = 3;
int ab2 = 4;

int x1 = 5;
int x2 = 6;
int x3 = 7;
int x4 = 8;

int wl1 = 9;

int x1w;
int x2w;
int x3w;
int x4w;


void setup() {
  pinMode(p1, OUTPUT);
  digitalWrite(p1, LOW);
  pinMode(p2, OUTPUT);
  digitalWrite(p2, LOW);
  pinMode(ab1, OUTPUT);
  digitalWrite(ab1, LOW);
  pinMode(ab2, OUTPUT);
  digitalWrite(ab2, LOW);

  pinMode(wl1, OUTPUT);
  digitalWrite(wl1, LOW);

  pinMode(x1, INPUT);
  pinMode(x2, INPUT);
  pinMode(x3, INPUT);
  pinMode(x4, INPUT);

}

void loop() {
  x1w = digitalRead(x1);
  x2w = digitalRead(x2);
  x3w = digitalRead(x3);
  x4w = digitalRead(x4);

  if(x1w == true && x2w == true && x3w == true && x4w == true){
    digitalWrite(p1, LOW);
    digitalWrite(p2, LOW);
    digitalWrite(ab1, HIGH);
    digitalWrite(ab2, HIGH);
  }

  else if(x1w == false && x2w == true && x3w == true && x4w == true){
    digitalWrite(p1, LOW);
    digitalWrite(p2, HIGH);
    digitalWrite(ab1, HIGH);
    digitalWrite(ab2, HIGH);
  }

  else if(x1w == false && x2w == false && x3w == true && x4w == true){
    digitalWrite(p1, HIGH);
    digitalWrite(p2, LOW);
    digitalWrite(ab1, LOW);
    digitalWrite(ab2, HIGH);
  }

  else if(x1w == false && x2w == false && x3w == false && x4w == true){
    digitalWrite(p1, HIGH);
    digitalWrite(p2, HIGH);
    digitalWrite(ab1, HIGH);
    digitalWrite(ab2, LOW);
  } 

  else if(x1w == false && x2w == false && x3w == false && x4w == false){
    digitalWrite(p1, HIGH);
    digitalWrite(p2, HIGH);
    digitalWrite(ab1, LOW);
    digitalWrite(ab2, LOW);
  }

  else {
    digitalWrite(wl1, HIGH);
  }
}