//Date: 17.09.2025
//Name: Rajaram Parida
//Redg: 2241016203
//Section: 28
//Exp. No.: 5.2

int ledPins[] = {2, 3, 4, 5, 6, 7, 8, 9};
int numLEDs = 8;

void setup() {
  for (int i = 0; i < numLEDs; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
  randomSeed(analogRead(0));
}

void loop() {
  bouncingBall();
  zigZag();
  randomBlink();
  knightRider();
  runningLights();
}

// Patterns

// 1. Bouncing Ball
void bouncingBall() {
  for (int i = 0; i < numLEDs; i++) {
    digitalWrite(ledPins[i], HIGH);
    delay(150);
  }
  for (int i = numLEDs - 1; i >= 0; i--) {
    digitalWrite(ledPins[i], LOW);
    delay(150);
  }
}

// 2. Zig-Zag
void zigZag() {
  for (int i = 0; i < numLEDs; i++) {
    digitalWrite(ledPins[i], HIGH);
    delay(100);
  }
  for (int i = numLEDs - 1; i >= 0; i--) {
    digitalWrite(ledPins[i], LOW);
    delay(100);
  }
}

// 3. Random Blink
void randomBlink() {
  for (int i = 0; i < numLEDs; i++) {
    int state = random(0, 2); // 0 or 1
    digitalWrite(ledPins[i], state);
  }
  delay(300);
  for (int i = 0; i < numLEDs; i++) {
    digitalWrite(ledPins[i], LOW);
  }
  delay(300);
}

// 4. Knight Rider
void knightRider() {
  for (int i = 0; i < numLEDs; i++) {
    digitalWrite(ledPins[i], HIGH);
    delay(120);
    digitalWrite(ledPins[i], LOW);
  }
  for (int i = numLEDs - 1; i >= 0; i--) {
    digitalWrite(ledPins[i], HIGH);
    delay(120);
    digitalWrite(ledPins[i], LOW);
  }
}

// 5. Running Lights
void runningLights() {
  for (int i = 0; i < numLEDs; i++) {
    digitalWrite(ledPins[i], HIGH);
    delay(150);
    digitalWrite(ledPins[i], LOW);
  }
}