#define s1h A0
#define s1v A1
#define left 4
#define right 5
#define up 2
#define down 3

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(s1h, INPUT);
  pinMode(s1v, INPUT);
  pinMode(left, OUTPUT);
  pinMode(right, OUTPUT);
  pinMode(up, OUTPUT);
  pinMode(down, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(100);
  digitalWrite(left, LOW);
  digitalWrite(right, LOW);
  digitalWrite(up, LOW);
  digitalWrite(down, LOW);
  int hor = analogRead(s1h)/500; // shows 2 for left, 1 for mid and 0 for right
  int vir = analogRead(s1v)/500; // shows 2 for up, 1 for mid and 0 for down
  if (hor == 0)
  {
    digitalWrite(right, HIGH);
  }
  else if (hor == 2)
  {
    digitalWrite(left, HIGH);
  }
  if (vir == 0)
  {
    digitalWrite(down, HIGH);
  }
  else if (vir == 2)
  {
    digitalWrite(up, HIGH);
  }
}