Joystick lights the way (LEDs on 8 to 11), on an Arduino Uno

// A joystick navigator: push the stick and the LED on that side lights.
//
//   joystick VRX -> A0   VRY -> A1   SW -> pin 2   +5V -> 5V   GND -> GND
//   pin 11 -> 220 ohm -> LED (left)    pin 8 -> 220 ohm -> LED (right)
//   pin 10 -> 220 ohm -> LED (up)      pin 9 -> 220 ohm -> LED (down)
//
// Each axis is a potentiometer: about 512 in the middle, near 0 at one end
// and near 1023 at the other. The switch under the stick joins SW to ground
// when you press it, so the pin uses the internal pull-up and reads LOW.

const int LEFT = 11;
const int RIGHT = 8;
const int UP = 10;
const int DOWN = 9;
const int X_PIN = A0;
const int Y_PIN = A1;
const int SW_PIN = 2;

void allLeds(int level) {
  digitalWrite(LEFT, level);
  digitalWrite(RIGHT, level);
  digitalWrite(UP, level);
  digitalWrite(DOWN, level);
}

void setup() {
  pinMode(LEFT, OUTPUT);
  pinMode(RIGHT, OUTPUT);
  pinMode(UP, OUTPUT);
  pinMode(DOWN, OUTPUT);
  pinMode(SW_PIN, INPUT_PULLUP);
  Serial.begin(9600);
  Serial.println("Mokxi Uno: push the joystick to light the way");
}

void loop() {
  int x = analogRead(X_PIN);
  int y = analogRead(Y_PIN);
  allLeds(LOW);
  if (digitalRead(SW_PIN) == LOW) {
    allLeds(HIGH);
    delay(150);
    allLeds(LOW);
  } else if (x < 300) {
    digitalWrite(LEFT, HIGH);
  } else if (x > 700) {
    digitalWrite(RIGHT, HIGH);
  } else if (y < 300) {
    digitalWrite(UP, HIGH);
  } else if (y > 700) {
    digitalWrite(DOWN, HIGH);
  }
  Serial.print("x ");
  Serial.print(x);
  Serial.print("  y ");
  Serial.println(y);
  delay(100);
}