Animated Water Ripple Effect

// Water Ripple Effect
const int NUM_LEDS = 6;
const int ledPins[] = {3, 5, 6, 9, 10, 11}; // PWM pins

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

void loop() {
  for (int i = 0; i < NUM_LEDS; i++) {
    int brightness = random(50, 200);
    analogWrite(ledPins[i], brightness);
  }
  delay(random(100, 300));
}