Larson Scanner code for ESP32

Larson-Scanner.ino

#define LED_DELAY 45

int ledArray[10] = {0, 15, 2, 4, 5, 18, 19, 21, 22, 23};

void setup() {
  for(int i=0; i<10; i++) {
    pinMode(ledArray[i], OUTPUT);
    digitalWrite(ledArray[i], HIGH);  //make all HIGH for now
  }
}

void loop() {
  for(int i=0; i<10; i++) { //up counting
    if((i != 0) && (i != 9)) {  //shouldn't do it for terminating LEDs
      pinMode(ledArray[i-1], INPUT);  //make preceding LED high Z
      pinMode(ledArray[i+1], INPUT);  //make succeeding LED high Z
      pinMode(ledArray[i], OUTPUT); //make the current LED pin to output !important
      digitalWrite(ledArray[i], LOW); //activate the pin
      delay(LED_DELAY);
    }
    else if(i == 0) { //if it is the first LED
      pinMode(ledArray[i+1], INPUT);  //just make one LED high Z
      pinMode(ledArray[i], OUTPUT);
      digitalWrite(ledArray[i], LOW);
      delay(LED_DELAY);
    }
    else {
      pinMode(ledArray[i-1], INPUT);  //just make one LED high Z
      pinMode(ledArray[i], OUTPUT);
      digitalWrite(ledArray[i], LOW);
      delay(LED_DELAY);
      digitalWrite(ledArray[i], HIGH);
    }
  }

  for(int i=9; i>=0; i--) { //down counting, everything is same except it's inverse
    if((i != 0) && (i != 9)) {
      pinMode(ledArray[i-1], INPUT);
      pinMode(ledArray[i+1], INPUT);
      pinMode(ledArray[i], OUTPUT);
      digitalWrite(ledArray[i], LOW);
      delay(LED_DELAY);
    }
    else if(i == 0) {
      pinMode(ledArray[i+1], INPUT);
      pinMode(ledArray[i], OUTPUT);
      digitalWrite(ledArray[i], LOW);
      delay(LED_DELAY);
    }
    else {
      pinMode(ledArray[i-1], INPUT);
      pinMode(ledArray[i], OUTPUT);
      digitalWrite(ledArray[i], LOW);
      delay(LED_DELAY);
      digitalWrite(ledArray[i], HIGH);
    }
  }
}