const int ledCount = 10; // the number of LEDs in the bar graph

int ledPins[] = {
  32, 33, 21, 22, 25, 26, 27, 14, 12, 13
}; // an array of pin numbers to which LEDs are attached

void setup() {
  // loop over the pin array and set them all to output and high
  for (int thisLed = 0; thisLed < ledCount; thisLed++) {
    pinMode(ledPins[thisLed], OUTPUT);
    digitalWrite(ledPins[thisLed], HIGH);
  }
}

void loop() {
  // loop over the LED array:
  for (int thisLed = 0; thisLed < ledCount; thisLed++) { // Change <= to <
    digitalWrite(ledPins[thisLed], LOW);
    delay(500);
  }

  for (int thisLed = 0; thisLed < ledCount; thisLed++) {
    digitalWrite(ledPins[thisLed], HIGH);
    delay(500);
  }
}