// Define LED pins
const int led1 = 2;
const int led2 = 3;
const int led3 = 4;
const int led4 = 5;

// Delay time for each pattern in milliseconds
const int delayTime = 200;

void setup() {
  // Set the LED pins as output
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);

  Serial.begin(115200);
  pinMode(A0, INPUT);
}

void loop() {
  // Pattern 1: All LEDs on and off
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  delay(delayTime);
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  delay(delayTime);

  // Pattern 2: Chasing light (left to right)
  digitalWrite(led1, HIGH);
  delay(delayTime);
  digitalWrite(led1, LOW);
  digitalWrite(led2, HIGH);
  delay(delayTime);
  digitalWrite(led2, LOW);
  digitalWrite(led3, HIGH);
  delay(delayTime);
  digitalWrite(led3, LOW);
  digitalWrite(led4, HIGH);
  delay(delayTime);
  digitalWrite(led4, LOW);

  // Pattern 3: Chasing light (right to left)
  digitalWrite(led4, HIGH);
  delay(delayTime);
  digitalWrite(led4, LOW);
  digitalWrite(led3, HIGH);
  delay(delayTime);
  digitalWrite(led3, LOW);
  digitalWrite(led2, HIGH);
  delay(delayTime);
  digitalWrite(led2, LOW);
  digitalWrite(led1, HIGH);
  delay(delayTime);
  digitalWrite(led1, LOW);

  // Pattern 4: Center to outward
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  delay(delayTime);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led1, HIGH);
  digitalWrite(led4, HIGH);
  delay(delayTime);
  digitalWrite(led1, LOW);
  digitalWrite(led4, LOW);

  int value = analogRead(A0);
  Serial.println(value);
  delay(100);
}